Outer Cup, Back: 83% Nylon, 17% Spandex Cup Pads: 52% Polyester Foam, 48% Silicone Inner Pad Lining: 65% Polyester, 35% Cotton Center Belt: 90% Nylon, 10% Spandex Center Belt Lining: 100% Nylon. Exclusive of Trim and Elastics.