ASTM F1720-06

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An American National Standard
Designation:F1720–06
Standard Test Method for
Measuring Thermal Insulation of Sleeping Bags Using a
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Heated Manikin
This standard is issued under the fixed designation F1720; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Sleeping bags are used by people in outdoor environments to insulate them from the cold (that is,
reduce their body heat loss to the environment). Sleeping bags often are used with ground pads and
clothing inside tents that provide additional protection from the environment. The amount of
insulation needed in a sleeping bag depends upon the air temperature and a number of other
environmental factors (for example, wind speed, radiant temperature, moisture in the air), human
factors(forexample,aperson’smetabolicheatproductionthatisaffectedbygender,age,fitnesslevel,
bodytype,size,position,andmovement),andphysicalfactors(forexample,amountofbodycoverage
and the quality of the insulating materials). The insulation value, expressed in clo units, can be used
tocharacterizesleepingbagsandsleepingbagsystems.Insulationvaluescanbeusedinbodyheatloss
models to predict the temperature ratings for comfort.
1. Scope 2. Referenced Documents
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1.1 This test method covers determination of the insulation 2.1 ASTM Standards:
value of a sleeping bag or sleeping bag system. It measures the F1291 Test Method for Measuring the Thermal Insulation
resistance to dry heat transfer from a constant skin temperature of Clothing Using a Heated Manikin
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manikin to a relatively cold environment. This is a static test 2.2 ISO Standards:
that generates reproducible results, but the manikin cannot ISO 13537 2002 Requirements for Sleeping Bags
simulate real life sleeping conditions relating to some human ISO 15831 2004 Clothing—Physiological Effects—
and environmental factors, examples of which are listed in the Measurement of Thermal Insulation by Means of a Ther-
introduction. mal Manikin
1.2 The insulation values obtained apply only to the sleep-
3. Terminology
ing bag, as tested, and for the specified thermal and environ-
3.1 Definitions:
mental conditions of each test, particularly with respect to air
movement past the manikin. 3.1.1 auxiliary products, n—items used with a sleeping bag
to create a sleeping bag system such as clothing, ground pad,
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the and bivy sack.
3.1.2 clo, n—unit of thermal resistance (insulation) equal to
responsibility of the user of this standard to establish appro-
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0.155°C·m /W.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3.1.2.1 Discussion—Aheavymen’sbusinesssuitprovides1
clo of insulation.
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This test method is under the jurisdiction of ASTM Committee F08 on Sports For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Equipment and Facilities and is the direct responsibility of Subcommittee F08.22 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Camping Softgoods. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2006. Published May 2006. Originally the ASTM website.
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approved in 1996. Last previous edition approved in 2004 as F1720 – 96 (2004). Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
DOI: 10.1520/F1720-06. 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1720–06
3.1.3 dry heat loss, n—heat transferred from the body 6.1.1 Size and Shape—Construct the manikin to simulate
surface to a cooler environment by means of conduction, the body of a human being, that is, construct a head, chest/
convection, and radiation.
back, abdomen/buttocks, arms, hands, legs, and feet. Total
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3.1.4 manikin, n—a life-size model of the human body with
surface area shall be 1.8 6 0.3 m , and height shall be 180 6
a surface temperature similar to that of a human being.
10 cm. Any departures from this description should be re-
3.1.5 sleeping bag, n—a structure made of down, synthetic
ported.
fiberfill, shell fabrics, or other materials, or a combination
6.1.2 Surface Temperature—Construct the manikin so as to
thereof, that is designed for people to use for thermal protec-
maintain a constant temperature distribution over the entire
tion when sleeping (for example, outdoors, tent, cabin).
nude body
...