This part of ISO 23537 specifies the requirements and test methods as well as provisions for labelling of adult sized sleeping bags for use in sports and leisure time activities. This part of ISO 23537 does not apply to sleeping bags intended for specific purpose such as military use and extreme climate zone expedition. It does not apply to sleeping bags for children or babies. NOTE 1 No prediction model exists for the determination of the limiting temperatures based on the thermal resistance of the sleeping bag for children and babies. Moreover, such a model for testing cannot be developed because the necessary controlled sleep trials with children or babies in climatic chambers are, out of ethical reasons, not permitted. NOTE 2 The limit temperature for extreme climate conditions is seen to be ?20 °C. This part of ISO 23537 describes the method for the assessment of the performance in steady-state conditions of a sleeping bag with regard to the protection against cold. NOTE 3 Sleeping bags without homogeneous fillings designed to provide local extra insulation in certain parts pose issues with the calibration and/or test procedure. Ongoing work continues to provide suitable means of establishing temperature ratings.st edition 2016-10-01 Requirements for sleeping bags — Part 1: Thermal and dimensional requirements Exigences pour les sacs de couchage — Partie 1: Exigences thermiques et dimensionnelles Reference number ISO 23537-1:2016(E) ？ ISO 2016 ISO 23537-1:2016(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2016, Published in Switzerland All rights reserved. Unless oth