Our underwear uses only the finest luxury fabric available surpasses cotton for softness, with a natural sheen & silky hand feel only comparable to silk, it is immediately noticeable as it touches your skin cooler than cotton. To insure that our underwear retains its shape wash after wash our designers insisted using only Dupont Lycra with the complete range over standard elastane. It will continue to hug and move with your body time and time again Machine Wash in cold water