Under Armour Men's UA HeatGear Armour Stretch Compression Shorts HeatGear - Lightweight fabric construction that draws moisture away from the skin and dries rapidly. Moisture Transport System - Draws moisture away from the skin in to the mid/outer layer to be evaporated. 4-way Stretch Construction - Affords an increased range of motion. Anti-Microbial Technology - Keeps the kit feeling and smelling fresher for longer. UPF30+ Protection - Protects the skin from prolonged exposure to strong sunlight.