ISO 23537-2-2016 pdf download.Requirements for sleeping bags一 Part 2: Fabric and material properties. 3.2 Filling material 3.2.1 Feather and/or down 3.2.1.1 ComposItion The composition of the filling material shall be determined in accordance with EN 12934. 3.2.1.2 Hygienic state The filling material shall conform to the requirements according to EN 12935. 3.2.1.3 Filling power The filling power shall be tested in accordance with EN 12130. The deviation of the filling power from the declared nominal value shall be
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