When Under Armour introduced The Original BoxerJock Boxer Briefs, all other men's underwear was soon rendered obsolete. Smooth, lightweight HeatGear fabric a 4.7-oz. blend of 90% polyester and 10% elastane has built-in four-way stretch for increased mobility and long-lasting shape retention. The Signature Moisture Transport System wicks away sweat and dries quickly to keep you cool and comfortable. Anti-odor technology prevents the growth of odor-causing microbes, ensuring that you stay fresher longer. Flatlock seam construction helps reduce chafing for even greater comfort. The button-closed fly is fully functional for ease of use. 6" inseam. Fitted design. Imported.