In the clothing insulation sector, consumers buying cold weather outerwear or employers selecting cold weather wear for workers need to consider the setting, the temperatures in that setting, and the length of time individuals will be spending in that environment. A major industry measure for insulation efficacy is the Intrinsic Insulation Value, also referred to as an item's CLO. Standardized CLO rates range from 1, for insulation suitable at 66°F, to 5, for insulation suitable for clothing worn in a setting where the temperature is -29°F.
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