Native Planet Men's Air Breeze Boxer Brief 88% CoolPass 12% Spandex Outstanding Sweat Wicking - Absorbs sweat faster then any other fabric. Routing the sweat away from the body in order to prevent a sweaty feeling against the user's clothing. Thermal Control - A smart cooling affect allows the CoolPass to wick away only excessive sweat without disturbing the body's natural sweat evaporation process. Comfort - Super smooth and breathable fabric. Odor reducing by antibacterial treatment.