Which material is recommended for undergarments that are worn under protective gear?

The recommended material for undergarments worn under protective gear is 100% cotton. This choice is favored because cotton is a breathable fabric that allows for moisture absorption, helping to keep the skin dry during strenuous activities, which is essential for comfort and thermal regulation. Additionally, cotton is less likely to irritate the skin compared to some synthetic fabrics, providing a layer of comfort during extended wear under protective equipment. This characteristic is critical in situations where protective gear may be worn for long periods, as it helps prevent heat build-up and skin-related issues.

While the other materials mentioned have their benefits, they may not perform as well as cotton in a fire service context. For instance, polyester and nylon are synthetic fibers that don't absorb moisture as effectively as cotton, potentially leading to discomfort. Wool, while warm and naturally fire-resistant, may not be as suitable for undergarments due to its potential for itchiness and less effective moisture-wicking properties compared to cotton. Therefore, 100% cotton remains the best option for undergarments worn under protective gear.