What percentage of cotton should personnel working in a heat-stress environment be wearing?

In a heat-stress environment, it is recommended that personnel wear cotton clothing comprising a minimum of 35% of the fabric. Cotton is favored in these situations due to its breathability, ability to wick moisture away from the skin, and overall comfort. This level of cotton content helps to regulate body temperature and reduces the risk of heat-related illnesses, which can be critical for personnel working in challenging outdoor conditions or in environments with high temperatures.

Wearing such a percentage of cotton ensures that the clothing aids in maintaining a level of comfort and protection from heat stress while performing physical tasks. In contrast, lower percentages would not provide adequate benefits, and higher percentages may not be as practical for moisture management.