Men's compression shorts Under Armor UA FLY FAST HALF TIGHT are made of very light HeatGear material, which wicks sweat away perfectly and dries very quickly. Compression clothing tightly surrounds the muscles, which increases the internal pressure and speeds up the blood supply, which has a positive effect on your athletic performance. The encapsulated elastic waist with internal tightening ensures a firm hold and has a built-in back pocket. Anti-Odor technology prevents the growth of odor-causing bacteria.