Thermoactive underwear UMF-01A "L"* High-quality underwear made of multilayer, breathable fabric that provides the highest level of convenience. By using the phenomenon of osmotic pressure formation, it enables the transport of water vapor from the body outside the clothing, thanks to which the skin stays dry and maintains thermal comfort. Additional insulation from the inside allows you to use the underwear in the cold season. Perfect for activities such as skiing, fishing, hunting, sailing, mountain biking, climbing, hiking or for the needs of the guard, army and police. The size of the underwear is chosen so that after putting on the fabric tightly adheres to the body allowing immediate evaporation of moisture.