Thermoactive long underwear from Hi-Tec, made with seamless technology from breathable fabric. The inner layer quickly wicks moisture away from the skin, keeping it dry even during intense exertion. The outer layer provides thermal insulation and helps maintain an optimal body temperature, preventing the body from cooling down. The ankle and hip areas reduce the risk of cold air getting under the fabric. Wide zones ensure a perfect fit and guarantee freedom of movement. The fabric is bacteriostatic, inhibiting the formation of unpleasant odors. Breathable, quick-drying, seamless.