Carhartt Men's Big & Tall Base Force Extremes Lightweight Boxer Brief 51% Polyester, 49% Other Fibers Imported Machine Wash Fast dry technology makes this our fastest drying gear Rugged flex technology for ease of movement Fights odors Fit is more supportive and closer to the body. Gusset at inseam for comfort and easy movement 51 percent polyester, 49 percent cocona