According to Baidu Encyclopedia, Crowe value is an engineering unit that describes the thermal insulation and warmth retention performance of clothing or fabrics, that is, "thermal resistance". Crowe value indicates the degree of thermal insulation of the fabric.
In the environment where the room temperature is 20℃ or 2 1℃, the relative humidity is not more than 50%, and the wind speed is not more than 10cm/s (equivalent to the normal indoor wind speed with ventilation), the thermal insulation value of clothes worn by a person sitting still or doing light mental work to keep comfortable is 1clo. The legal unit of measurement is defined as 1 clo.