EN ISO 25649-4:2024

SLOVENSKI STANDARD
01-marec-2025
Nadomešča:
SIST EN ISO 25649-4:2017
Plavajoči pripomočki za prosti čas, ki se uporabljajo na vodi in v njej - 4. del:
Dodatne posebne varnostne zahteve in preskusne metode za pripomočke razreda
B (ISO 25649-4:2024)
Floating leisure articles for use on and in the water - Part 4: Additional specific safety
requirements and test methods for Class B devices (ISO 25649-4:2024)
Schwimmende Freizeitartikel zum Gebrauch auf und im Wasser - Teil 4: Zusätzliche
besondere sicherheitstechnische Anforderungen und Prüfverfahren für Artikel der Klasse
B (ISO 25649-4:2024)
Articles de loisirs flottants à utiliser sur ou dans l'eau - Partie 4: Exigences de sécurité et
méthodes d'essai complémentaires propres aux dispositifs de Classe B (ISO 25649-
4:2024)
Ta slovenski standard je istoveten z: EN ISO 25649-4:2024
ICS:
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 25649-4
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2024
EUROPÄISCHE NORM
ICS 97.220.40 Supersedes EN ISO 25649-4:2017
English Version
Floating leisure articles for use on and in the water - Part
4: Additional specific safety requirements and test
methods for Class B devices (ISO 25649-4:2024)
Articles de loisirs flottants à utiliser sur ou dans l'eau - Schwimmende Freizeitartikel zum Gebrauch auf und
Partie 4: Exigences de sécurité et méthodes d'essai im Wasser - Teil 4: Zusätzliche besondere
complémentaires propres aux dispositifs de Classe B sicherheitstechnische Anforderungen und
(ISO 25649-4:2024) Prüfverfahren für Artikel der Klasse B (ISO 25649-
4:2024)
This European Standard was approved by CEN on 2 November 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25649-4:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European standard and the safety
requirements of Directive 2001/95/EC aimed to be covered . 4

European foreword
This document (EN ISO 25649-4:2024) has been prepared by Technical Committee ISO/TC 83 "Sports
and other recreational facilities and equipment" in collaboration with Technical Committee CEN/TC
136 “Sports, playground and other recreational facilities and equipment” the secretariat of which is held
by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2025, and conflicting national standards shall be
withdrawn at the latest by May 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 25649-4:2017.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 25649-4:2024 has been approved by CEN as EN ISO 25649-4:2024 without any
modification.
Annex ZA
(informative)
Relationship between this European standard and the safety requirements
of Directive 2001/95/EC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request Mandate
M/372 Floating leisure products for use on or in the water to provide one voluntary means of
conforming to the product safety requirements for floating leisure products for use on or in the water
pursuant to Directive 2001/95/EC of the European Parliament and of the Council.
Once this standard is cited in the Official Journal of the European Union under that Directive
2001/95/EC, compliance with the normative clauses of this standard given in Table ZA.1 confers,
within the limits of the scope of this standard, a presumption of conformity with the corresponding
safety requirements set in the Directive and specified in the request M/372 and associated EFTA
regulations.
Table ZA.1 — Correspondence between this European Standard and Commission Decision No
2005/323/EC of 21/04/2005 implementing the General Product Safety Directive 2001/95/EC
and Commission's standardization request M/372 for floating leisure articles for use on or in the
water
Correspondence between this European Clause(s)/subclause(s) of   Remarks/Notes
Standard and the Safety Requirements this EN ISO 25649-4
of
Commission Decision No 2005/323/EC
implementing the Directive 2001/95/EC
and specified in the request M/372
C.1 Specific safety requirements
C.1 (a) floating stability in accordance with 4.4, 4.5
the intended and foreseeable use;
C.1 (b) minimum buoyancy and, in case of 4.4, 4.5
inflatable articles, residual buoyancy after
failure of one air chamber. Additionally
retention of function where appropriate
and in particular where collective use is
intended or likely;
C.1 (d) easy escape in case of capsizing, 4.4.5, 4.5.4, A.5, A.7.5
avoidance of any other forms of
entrapments or entanglement regarding
parts of the human body
C.1 (e) means to facilitate re-embarkation N/A
in particular where collective use is
intended as well as means of getting hold
when in the water in an emergency;
C.1 (f) presence of a reliable quick release N/A
for products moved (towed) at high speed;
Correspondence between this European Clause(s)/subclause(s) of   Remarks/Notes
Standard and the Safety Requirements this EN ISO 25649-4
of
Commission Decision No 2005/323/EC
implementing the Directive 2001/95/EC
and specified in the request M/372
C.2 Warnings and information in respect of cautious use of the product
C.2 (a) labelling regarding limitation of use:
—  Number of users 4.2
—  Total weight 4.2
—  Risks linked to wind 4.1, Clause 5
—  currents and tides 4.1, Clause 5
—  specifications on distance from shore 4.1, Clause 5
—  height 4.1, Clause 5
—  speed 4.1, Clause 5
—  interactions with other products and 4.1, Clause 5
objects (safety distance)
—  foreseeable misuse 4.1, Clause 5
C.2 (b) Warning “Attention: no protection Clause 5
against drowning. Swimmers only”
C.2 (c) Use of adequate personal protective Clause 5
equipment (PEE) against drowning and for
impact resistance.
C.2 (d) Instruction of inflation and pressure 5.4
conditions, maintenance, repair, storage
and disposal (repeated use and aging
process)
C.2 (e) specific warnings for categories of 5.2, 5.3, 5.4.2, 5.4.4
consumers at risk when using product
(children, non-swimmers, elderly, etc.)
WARNING 1 Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 Other Union legislation may be applicable to the products falling within the scope of
this standard.
International
Standard
ISO 25649-4
Second edition
Floating leisure articles for use on
2024-10
and in the water —
Part 4:
Additional specific safety
requirements and test methods for
Class B devices
Articles de loisirs flottants à utiliser sur ou dans l’eau —
Partie 4: Exigences de sécurité et méthodes d’essai
complémentaires propres aux dispositifs de Classe B
Reference number
ISO 25649-4:2024(en) © ISO 2024

ISO 25649-4:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 25649-4:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Safety requirements and test methods . 2
4.1 General .2
4.2 Sizing .3
4.2.1 Sizing of B1 devices, fit to user’s body and test probes .3
4.2.2 Sizing of B2.1 (being-in type) devices, loose fit to body .4
4.2.3 Sizing of B2.2 (sitting-on type) devices, loose fit to the body .5
4.3 Strength of entire device Class B1 .5
4.3.1 Requirement .5
4.3.2 Strength of entire device Class B1, test method . .7
4.4 In-water performance of Class B1 devices .8
4.4.1 In-water behaviour, static floating stability of Class B1 devices for children of
4 years old to 8 years old .8
4.4.2 In-water behaviour, static floating stability of Class B1 devices for children
above 8 years of age (test panel of human test subjects, device fully inflated) .10
4.4.3 In-water behaviour, dynamic stability for Class B1 devices intended for children
of 4 years to 7 years of age (30 kg) .11
4.4.4 Residual buoyancy and retention of function of Class B1 devices (children up to
7 years, 30 kg).11
4.4.5 Escape from the Class B1 device (body entrapment, leg or foot entanglement) .11
4.5 In-water performance of Class B2 devices . 12
4.5.1 In/water behaviour, static floating stability of Class B2 devices for children up
to 7 years . 12
4.5.2 In-water behaviour, static floating stability of Class B2 devices for children
above 7 years of age (30 kg) . 15
4.5.3 Residual buoyancy and retention of function of Class B2 devices for children of
3 years (36 months) to 8 years (96 months) of age . 15
4.5.4 Escape from the Class B2 device (body entrapment, leg or foot entanglement) . 15
5 Consumer information .16
5.1 General .16
5.2 Consumer information on the packaging (point of sale information) .16
5.3 Consumer information on the product (information related to safe use) .16
5.4 Consumer information by instructions for use (separate written information) .16
5.4.1 General .16
5.4.2 Safety and product information .16
5.4.3 Assembly.16
5.4.4 Maintenance and repair .16
6 Exclusions . 17
Annex A (informative) Optional manikin testing for swim seats as one possible embodiment of
Class B1 devices, requirements .18
Annex B (informative) Examples of products forming Class B .23
Bibliography .25

iii
ISO 25649-4:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of
(a) patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 83, Sports and other recreational facilities and
equipment, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 136, Sports, playground and other recreational facilities and equipment, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 25649-4:2017), which has been technically
revised.
The main changes are as follows:
— update of the introduction;
— update of Clause 2;
— in Table 3, modifications of smallest interior dimensions for xx-large devices;
A list of all parts in the ISO 25649 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO 25649-4:2024(en)
Introduction
0.1  General
Class B devices are marketed and used for activities in the water. Typically, they are characterized by a
partly immersed position of the user inside the device, distinguishing them from other floating devices.
The development of new products in this area is progressing. Beyond the classical swim seat rafts for more
dynamic action on and in the water, different body postures and extended user groups have been developed.
ISO 25649-4 aims at increased safety with regard to all foreseeable uses of Class B floating leisure articles.
This document does not apply to only one technically clearly determined product, but to a diverse group
of products including two major design principles, B1 and B2, as laid down in the classification of Class B
floating leisure articles (see Clause 4).
Figure 1 shows the distinction between Classes B1 and B2 products.
Class B1 includes products, e.g. swim seats for children older than 36 months, with an interior body holding
system. In the case of very young users (non-swimmers 4-years-old and older) the body position can be such
that the body is kept afloat and laterally supported by a surrounding inflatable structure. This structure
provides a relatively tight fit between user and buoyant structure, creating a risk of entrapment in case of
capsizing.
Class B1 products for children younger than 36 months are dealt with in EN 13138-3:2021.
Class B2 products do not provide this kind of support for the body of the user. Although they have a
circumferential buoyant structure in common with Class B1 products ‒ and thus a risk of entrapment if this
fit becomes too tight ‒ flotation of the user depends on his ability to hold himself by hands or body inside the
very loosely surrounding buoyant structure.
Both classes of products include also adult use. Activities range from passive floating to actions such as
wave surfing, tubing, balancing, swinging, etc. (See Figure 1). The devices are associated with the identified
risks given in Table 1.
Since Class B products support the user's body in a partly and permanently immersed position, they do
not need requirements for re-embarkation (unlike ISO 25649-3 devices). The degree of immersion can
vary. In the case of a big floating ring, e.g. B1.1 and B2.2, the user can be immersed up to the chest or only
the buttocks can be immersed. In the case of B1-products (e.g. swim seat), the human body is permanently
immersed to a large degree.
Dealing with a partly intentionally immersed human body leads to the question of loads to be applied for
appropriate testing. For the purpose of this document, load resulting from the body weight is set with 75 %
of the body weight of the heaviest foreseeable or specified user, even when in certain circumstances this
immersed body weight may be reduced to roughly 10 %. In the case of devices on top of which the user can
sit (e.g. big rings) the maximum body weight out of the stipulated user group is assessed as adequate.
0.2  Child testing
See Annex A and ISO 25649-1:2024, Clause 4, as alternatives. Class B products can be used by children
from the age of 4 years. Some essential requirements ensuring safety in use and in dangerous situations
which can occur ‒ e.g. capsizing ‒ cannot be simulated and verified via the application of forces or other
instrumental procedures, but only by practical testing involving human test subjects or test manikins
that sufficiently represent the envisaged user groups. Children testing increases the nearness to real-life
situation but can lead to subjective results. An increased number of test cycles is an appropriate means to
get an average result that makes the subjective test more objective. The use of test manikins reduces the
nearness to real life situation but increases reproducibility of testing. The worst alternative is to eliminate
certain requirements if they cannot be verified for the lack of either test manikins or human test subjects.
This document refers amongst others to children as test subjects. The anthropometric requirements related
to these test subjects are based on children 5 years of age and 9 years of age with a body height of 126 cm
and 149 cm and a body weight of 25 kg and 38 kg, respectively. Children of 14 years of age and above can be
th
represented by the smallest adult female person representing the 5 percentile of the anthropometric range.

v
ISO 25649-4:2024(en)
In order to provide in all cases an alternative to child testing, the anthropometric data of relevant manikins
are specified for optional application in Annex A.
NOTE Rings and ring shaped tubes dealt with in this document are in no case swim rings as means to learn to
swim (see EN 13138-2) but water leisure articles for hanging in or sitting on.
Figure 1 — Interior structure Class B devices

vi
ISO 25649-4:2024(en)
vii
Table 1 — Introductory risk analysis
Position of user
Function; range Type of in regard to the Partial risk related to
Protection aims
Class Typical products Place of use of usage; target/ movement/ equipment, Predictable misuse water Final risk
standard/ regulation
age group propulsion elevation environment
above water
Floating structures Depending Children; Mainly drifting; In-water position; main Dangerous distance Capsizing, entrapment, Avoidance of
with on age group adolescents; propulsion only parts of body are below from bank/ shore; entanglement; capsizing entrapment or
circumferential and large variety with by swimming the water surface; no use in currents and/ in combination with entanglement;
buoyancy chambers capability regard to age and strokes; third elevation above water or dangerous off- entrapment can lead to floating stability;
B
around user’s body, to swim: use (max. 16 years party acting, level, sitting kneeling, shore winds; use by fatal accidents; drifting residual buoyancy;
DROWNING
body opening with pool, close to to 18 years); no moving by hand standing, laying non-swimmers (B2); away through current warning notes;
(B1, B2)
(B1) or without (B2) shore, lake, infants paddling, action capsizing (B1); wrong or wind easy escape in the
interior body hold- pond in waves for ado- size allocation (user case of capsizing;
ing system, various lescents wedged-in device); adult supervision;
body postures lack of supervision suitable sizing system

International Standard ISO 25649-4:2024(en)
Floating leisure articles for use on and in the water —
Part 4:
Additional specific safety requirements and test methods for
Class B devices
1 Scope
This document specifies additional specific safety requirements and test methods for Class B floating leisure
articles for use on and in the water regardless whether the buoyancy is achieved by inflation or inherent
buoyant material.
This document is applicable for Class B floating leisure articles as specified in ISO 25649-1:2024, Table 1.
Class B devices provide a buoyant structure with one or more body openings into which the user is positioned
partly immersed.
NOTE 1 Typical products in Class B (see Annex B):
— floating rafts with interior body holding system (“swim seats”) mostly in circular or square shape, fantasy shape
for playing purposes;
— floating fantasy shaped structures with one or more openings to host a child’s body, with or without body
holding system;
— floating with slits or openings to put legs through any shape;
— floating rings with interior seat segments inside the circular body opening.
NOTE 2 Typical places for application:
— pools;
— protected areas of lakes, ponds;
— protected areas of sea shore (no offshore winds, no currents).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 25649-1:2024, Floating leisure articles for use on and in the water — Part 1: Classification, materials,
general requirements and test methods
ISO 25649-2:2024, Floating leisure articles for use on or in the water — Part 2: Consumer information
EN 13138-3:2021, Buoyant aids for swimming instruction — Part 3: Safety requirements and test methods for
swim seats into which a user is positioned
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 25649-1:2024 and the following apply.

ISO 25649-4:2024(en)
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
residual buoyancy
provision of remaining buoyancy in case of a defect of a buoyancy chamber
3.2
floating stability
capability of a non-moving buoyant structure to withstand internal and external forces that tend to capsize
it and to maintain a stable floating position
Note 1 to entry: Internal forces leading to capsizing can result from uneven load distribution, external forces leading
to capsizing can result from wind or waves.
3.3
device to be balanced by the user
product of which the upright floating depends on user’s skill and sense to balance it
3.4
escape
easy and complete separation between the user and the device in case of capsizing of the device or system
without hindrance through a part or feature of the floating device
3.5
swim seat
buoyant device intended to introduce the user to the aquatic environment and to build water confidence as
a pre-requisite to learning to swim, which provides safety for the user but no guaranteed protection against
drowning
Note 1 to entry: Swim seats are learning aids and shall not be mistaken with aquatic toys as defined in EN 71–1.
[SOURCE: EN 13138-3:2021, 3.11]
3.6
body holding system
system that is constituted by any means inside the circumferential buoyant structure that supports the
user's body
Note 1 to entry: Body holding systems enable users to stay in the partly immersed position without needing to hold
themselves to not slip through the opening into the water. The body holding system can be designed to allow a sitting,
kneeling, standing or lying posture. It can be integrated into the interior opening of the buoyant structure or added as
a separable component.
3.7
inherent buoyant material
non-crosslinked (closed-cell) foam or other materials enclosed in (a) sealed compartment(s) in the hull that
have a specific weight lower than 1 kg/dm
Note 1 to entry: Floating leisure articles made from inherent buoyant material are considered buoyant structures
(hull) achieving all or parts of their intended shape and buoyancy through soft foam, hard foam or sealed chambers
filled with air, gas or granules.
4 Safety requirements and test methods
4.1 General
Construction of Class B devices shall be such that it corresponds, in terms of design, dimensions, safety,
strength and durability to its intended use.

ISO 25649-4:2024(en)
Where Class B devices are provided in several components, the requirements set out in ISO 25649-1:2024
shall be applied to all components. These components shall be permanently attached if they contribute
indispensably to safety and performance.
With regard to general material and design requirements, Class B devices shall meet the requirements
specified in ISO 25649-1:2024.
In individual cases, due to the unpredictability of future products, a corresponding choice shall be made.
Class B products shall be marked with the safety information markings, as specified in ISO 25649-2:2024,
Clause 4.
4.2 Sizing
4.2.1 Sizing of B1 devices, fit to user’s body and test probes
4.2.1.1 Requirements
The child’s torso and thighs shall be represented by test probes representing the anthropometrically
th
relevant 95 percentile, male body dimensions of the labelled age/weight group. The torso and thigh probes
shall slip easily through the body or leg openings respectively (see Figure 2).
Sizing of Class B1 devices shall be in accordance with the range of body weights and age groups as specified
in Table 2 (for sizing safety information symbols see ISO 25649-2:2024).
Table 2 — Minimum dimensions for interior body openings
Body weight Age range Torso probe dimensions Thigh probe diameter
a a a a
A × B × C D
kg years mm mm
a b
22 to 25 4 to 5 260 × 210 × 400 168 (140 )
a b
28 to 34 6 to 8 310 × 240 × 450 192 (160 )
a b
38 to 48 9 to 11 330 × 250 × 500 222 (185 )
a b
54 to 61 12 to 13 350 × 260 × 550 264 (220 )
The 14 year-old child user may be represented by the human adult test subject 4 as
69 and above 14 and above specified in ISO 25649-1:2024, Table 2. ISO 25649-1:2024, Table 2 can be consulted
for test subjects above 14 years of age (test persons 3 and 4).
a
Anthropometric data, + 20 % safety margin (applicable test value).
b th
95 percentile, male, oldest child of age range.

ISO 25649-4:2024(en)
Dimension in millimetres
Key
A, B, C torso probe dimensions (in mm)
D thigh probe diameter (in mm)
R radius (in mm)
Figure 2 — Test probes for torso and thighs
The material of the probe in Figure 2 and Figure 3 shall be a rigid material (e.g. wood or plastic).
The interior size of the device corresponds to the relevant body weight as specified in Table 2. This size
[designated user(s)] shall be labelled on the product and on the packaging by applying the following safety
information symbols specified in ISO 25649-2:2024:
— “user’s body weight range” (Figure 24);
— “size designation for interior size” (Figure 33);
— “risk of getting entrapped if size is not appropriate” (Figure 10);
— “avoid entrapment, ensure loose fit” (Figure 26).
4.2.1.2 Test method
For the application of torso and leg probes, check whether the required safety information symbols have
been applied by visual verification.
NOTE The body opening for users up to 14 years old are given in Table 3 only to avoid body entrapment and
provide space for action. As there is no longer need for body support, they can be seen as minimum dimensions for the
biggest user of the range. Adult use can be provided for therapeutic purposes and other uses.
4.2.2 Sizing of B2.1 (being-in type) devices, loose fit to body
4.2.2.1 Requirements
The interior space of Class B2.1 devices shall be such that in any case the biggest designated user will still
keep a very loose fit to his/her body and will in no case get entrapped by the surrounding buoyant structure
(see also 4.5).
Devices shall be labelled with the safety information symbols “user’s body weight range” and if appropriate
with “maximum load capacity” for maximum load and body weight, in accordance with ISO 25649-2:2024,
Figure 24 and Figure 27 respectively. Sizing shall be in accordance with Table 3.

ISO 25649-4:2024(en)
4.2.2.2 Test method
For the application of torso probes, verify visually whether the required safety information symbols have
been applied.
4.2.3 Sizing of B2.2 (sitting-on type) devices, loose fit to the body
4.2.3.1 Requirements
The interior space of B2.2 devices is deemed to prevent the user from sagging in and thus trapping the body,
if the following requirements are met.
a) The interior space dimensions are in accordance with Table 3 and labelled according to this document
(See ISO 25649-2:2024, Figure 33 for safety information symbol “size designation for interior size”).
b) Safety information symbols have been applied, as specified in ISO 25649-2:2024: “risk of getting
entrapped if size is not appropriate” (Figure 10), “avoid entrapment ensure loose fit” (Figure 26) and
“user’s body weight range” (Figure 23).
c) Entrapment shall not be permitted. The sizing of devices shall be designed accordingly. The intended
user shall be able to slip vertically through the opening and it shall not be able to become entrapped
when sagging down into the opening from a “sitting-on” position.
If B2.2 devices are equipped with a bottom (sheet, mesh, etc.), ISO 25649-3:2024 applies.
Table 3 — Sizing for the inner opening of “being-in” (B2.1) and “sitting-on” (B2.2) devices
Smallest interior dimension Max. body weight Age category
No. Size
mm kg years
a
1 x-small 310 (260) 25 Child, 4 to 5
a
2 Small 370 (310) 34 Child, 6 to 8
a
3 Medium 370 (330) 48 Child, 9 to 11
a
4 Large 400 (348) 61 Child,11 to 13
a
5 x-large 440 (360) 69 to 100 Adult, 14 and older
b
6 xx-large 570 69 to 120 Adult, 14 and older
a th
95 percentile, male × 1,2 = min. inner diameter (the dimensions are rounded and harmonized).
b
Obese adult persons, biggest available clothing size, for more extreme body build warning shall be obeyed.
4.2.3.2 Test method
Measurement of inner width by test probes shall be in accordance with Table 3.
4.3 Strength of entire device Class B1
4.3.1 Requirement
When tested in accordance with 4.3.2, no part or component of the Class B1 device, e.g. body holding
system, straps, seat pants or their attachment to the buoyant structure (welding seams) shall break or show
any deficiency compromising safety. Loads shall be applied according to Figure 3 for the vertical force or
according to Figure 4 for the load application.

ISO 25649-4:2024(en)
Dimensions in millimetres
Key
1 load (body mass of max. designated user)
2 B1 device (swim seat)
3 test board, opening in compliance with the contour of B1 device to be tested
a
Radius of test board’s upper edge.
Figure 3 — Class B1, strength of entire device, load application by single load

ISO 25649-4:2024(en)
Key
1 load (test manikin according to max. designated user)
2 B1 device (swim seat)
3 test board, opening in compliance with the contour of B1 device to be tested
a
Radius of test board’s upper edge (see Figure 3).
Figure 4 — Class B1, strength of entire device, test manikin application
4.3.2 Strength of entire device Class B1, test method
Place the device on an appropriate even surface in a way that the buoyancy structure is completely supported
and the body holding system hangs freely downwards where applicable. Load the body holding system with
a dead weight representing the body mass of the maximum user of the designated body weight range. Load
duration: 10 min, ambient temperature 20 °C. Alternatively, the test manikins as specified EN 13138-3:2021,
Annex A, may be applied as near to reality load where applicable.

ISO 25649-4:2024(en)
4.4 In-water performance of Class B1 devices
4.4.1 In-water behaviour, static floating stability of Class B1 devices for children of 4 years old to
8 years old
4.4.1.1 Requirements
With the appropriate loading device in position as specified in 4.4.1.2, Class B1 products for children up to
5 years or up to 8 years of age shall not capsize when subjected to the test as specified in 4.4.1.2. Alternatively,
the test manikins and test procedures as specified in EN 13138-3:2021, Annex B may apply for products for
this age group.
4.4.1.2 Testing by load application (Class B1, mechanical testing)
4.4.1.2.1 General
Testing shall comprise the following test sequences.
a) Device fully inflated and load applied asymmetrically inside the device (tangentially) at the inner wall
or, in case of neighbouring chambers, at the inner wall of the outer buoyancy chamber at the place most
likely to cause to failure (see Figures 5 and 6).
b) Air chamber most likely to cause failure deflated (residual buoyancy), device loaded at the centre line of
each body opening but at a distance d from centre point of the body opening. The load L shall represent
75 % of the body weight and the distance d = 25 % of the body width of the biggest allowable user of the
stipulated age range. Body weights: see Table 3; body sizes: according to symbol e in EN 13138-3:2021,
Table A.1.
4.4.1.2.2 Test board(s)
Material: wood or similar rigid material.
Dimensions: adjustable in length, fixed width of 200 mm, rounded edges.
Features: adjustable straps for attachment to buoyant device (including single and multiple user devices),
means to attach a load (steel) by hanging it vertically on the board at any place.
4.4.1.2.3 Load application for Class B1 devices
The diversity of the product group makes complete anticipation of load configurations impossible. In cases
where the load application board cannot be applied as shown in Figure 5 and Figure 6, a device and/or
application ensuring the same effects shall be chosen. Figures 5 and 6 show the load application for Class B1
single seaters.
EXAMPLE 1 Device for sitting posture as one possible embodiment of Class B1 products (mainly child use).

ISO 25649-4:2024(en)
Key
1 test board
2 attachment strap
L load, 75 % of body weight (steel)
d distance from centre point on centre line
a
Load application when fully inflated.
b
Load application after failure of one air
...