This standard specifies a test method to determine the thermal conductivity of uppers, lining and insocks irrespective of the material, in order to assess the suitability for the end use.
DIN EN 13521:2002 history
2018DIN EN ISO 17705:2018 Footwear - Test methods for uppers, lining and insocks - Thermal insulation (ISO 17705:2003)
2002DIN EN 13521:2002 Footwear - Test methods for uppers, lining and insocks - Thermal insulation; German version EN 13521:2001