Underwear (top) US LVL 1 is an element of the first layer of clothing, intended to be worn in cold weather or in situations when our skin requires protection from the sun. Made of well-breathable polyester Helikon-Tex® Quick Dry fabric, it efficiently wicks moisture away from the body surface, ensuring comfort during long hours of use. Flat seams minimize the risk of abrasions, and raglan sleeves ensure comfortable movement in the shoulder area. It is an excellent choice for intense and long-lasting activities.