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Evaporation of sweat from skin is the body’s primary mode of temperature regulation on hot days.
Clothing can impact heat and sweat production, as well as the rate of evaporation, so clothing
decisions are important to prevent heat stress.
Choose lightweight, loose-fitting clothing made of a breathable fabric like cotton which allows sweat
to evaporate and air to move across the skin, cooling the body. Choose light-colored clothing, which
reflects heat, and a wide-brimmed hat to shade around the head.
Generally, less clothing is desirable in hot environments, except when the air temperature is greater
than 95°F or a person is working in the direct sun. In these cases, covering exposed skin can reduce
the risk of heat stress.
Personal protective equipment like gloves, respirators, and coveralls can significantly increase
metabolic heat production, reduce evaporation of sweat, and increase the risk of heat illness. Schedule
all tasks requiring PPE for cooler times of day such as morning and evening.