ANSI/ISEA 201-2019

American National Standard for Insulation and Wash Durability Classification of Apparel Used in Cold Work Environments

ANSI/ISEA 201-2019 establishes classification requirements for occupational apparel items worn in cold environments. The apparel items specified in this standard are insulated so as to reduce heat loss from the body to a cold environment and are intended to protect workers from cold stress related impairments including hypothermia, frostbite and chilblains. Specific criteria are included for thermal insulation (in units of clo) and thermal transport properties. The resistance to the deterioration of these properties due to laundering may be optionally assessed and classified accordingly. The standard also includes garment care and labeling requirements and provides guidance on the selection of the apparel items based on given environments and activity levels.