Craft Sportswear Men's Greatness Cool 9" Technical Boxer Athletic Base Layer Underwear: protection/ventilation/bike/cycle/ski/outdoor/sport/wicking 88% Polyester, 12% Elastane Imported Ergonomic fit for total freedom of movement, designed to keep you cool while exercising Lightweight micro polyester mesh fabric pulls perspiration vapor off the body to keep you cool 6 inch inseam Fly construction