ASTM F1932/F1932M-98(2018)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F1932/F1932M − 98 (Reapproved 2018) An American National Standard
Standard Test Method for
Measuring Sleeping Bag Loft
This standard is issued under the fixed designation F1932/F1932M; 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
The loft (that is, thickness) of a sleeping bag refers to the total thickness of a closed sleeping bag.
It is a physical dimension/measurement used for specifications, design, and quality control. Loft, in
and of itself, is not to be used to predict the thermal properties of a sleeping bag.
1. Scope thereof, that is designed for people to use for thermal protec-
tion when sleeping (for example, outdoors, tent, cabin).
1.1 This test method covers the determination of the loft of
a sleeping bag under a standardized load.
3. Significance and Use
1.2 The test method uses a physical height measurement
3.1 In this context, this test method can be used for
applicable in the laboratory.
specifications, design, and quality control. Loft, in and of itself,
1.3 The values stated in either SI units or inch-pound units
is not to be used to predict the thermal properties of a sleeping
are to be regarded separately as standard. Within the text, the
bag.
inch-pound units are shown in brackets. The values stated in
each system are not exact equivalents; therefore, each system 4. Apparatus
shall be used independently of the other. Combining values
4.1 Gantry, a rigid structure of sufficient height and width to
from the two systems may result in nonconformance with the
span all sleeping bags to be measured is required. A purpose-
test method.
built device of the sort shown in Fig. 1 may be used, or a
1.4 This standard does not purport to address all of the
structure as simple as an office desk or workbench can suffice.
safety concerns, if any, associated with its use. It is the
4.2 Rule, having 1-mm [ ⁄16-in.] graduations, and long
responsibility of the user of this standard to establish appro-
enough to measure the zero height position.
priate safety, health, and environmental practices and deter-
4.3 Disk, having diameter of 30 cm [12 in.]. The weight of
mine the applicability of regulatory limitations prior to use.
the disk plus the rule must equal 50 g [1.8 oz] for a pressure of
1.5 This international standard was developed in accor-
6.9 Pa [0.001 psi]. Commercially available foam core dry-
dance with internationally recognized principles on standard-
mount board is suitable. A range of 61 % in diameter and
ization established in the Decision on Principles for the
65 % in weight is tolerable. Mark the center of the disk for
Development of International Standards, Guides and Recom-
positioning the rule during the test procedure.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Conditioning
2. Terminology
5.1 Remove the sleeping bag from the stuff sack, zip the bag
closed, and shake it for approximately 1 min, (for example, a
2.1 Definitions:
person shall hold the bag and shake it, turning it periodically
2.1.1 loft, n—the total thickness of a closed sleeping bag as
during the shaking). Lay it flat in an uncompressed state for at
measured while the bag is lying flat on a surface.
least 24 h prior to testing. A bag that has not been compressed
2.1.2 sleeping bag, n—a structure made of down, synthetic
in the 24 h prior to testing shall be considered to be conditioned
fiberfill, shell fabrics, or other materials, or a combination
(for example, bags drawn directly from production, bags
shipped uncompressed, replicate tests).
This test method is under the jurisdiction of ASTM Committee F08 on Sports
6. Procedure
Equipment, Playing Surfaces, and Facilities and is the direct responsibility of
Subcommittee F08.22 on Camping Softgoods.
6.1 Perform conditioning and testing at ambient tempera-
Current edition approved Oct. 1, 2018. Published November 2018. Originally
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