Thermal underwear, or base layers, is an essential part of the uniforms of the US military. Base layers are worn by soldiers and other military personnel to provide warmth and insulation, especially in cold weather. Base layers are also designed to wick away moisture and sweat, helping to keep the skin dry and comfortable.
The US military has a long history of using thermal underwear, dating back to the early 20th century. During World War II, the US military began issuing thermal underwear to soldiers as a way to keep them warm in cold weather. Thermal underwear was especially useful for soldiers stationed in cold, snowy regions, and it helped to improve morale and combat effectiveness.
Today, thermal underwear is still an essential part of the US military's uniforms, and it is used by soldiers and other military personnel in a variety of roles and environments. Base layers are worn under other clothing and armor to provide additional warmth and insulation, and they are also used to regulate body temperature and moisture.
Overall, thermal underwear is an important part of the US military's uniforms, providing warmth and insulation as well as moisture-wicking properties to help soldiers and other military personnel perform at their best in a variety of conditions.
