ANSI/ISEA 201-2019规定了寒冷环境下穿着的职业服装的分类要求。本标准中规定的服装项目是隔热的，以减少身体在寒冷环境中的热量损失，并旨在保护工人免受寒冷应激相关损伤，包括低温、冻伤和冻疮。具体标准包括隔热（以clo为单位）和热传输特性。可选择性地评估这些财产因洗钱而退化的耐受性，并据此进行分类。该标准还包括服装护理和标签要求，并提供了基于给定环境和活动水平选择服装项目的指南。

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.