Cups, cup extension, support panel, center: 92% Nylon, 8% Spandex. Cup lining, center lining: 92% Cotton, 8% Spandex. Back: 95% Cotton, 5% Spandex. Center inner lining: 100% Nylon. Cup extension lining: 65% Polyester, 35% Cotton. Cup extension inner pad: 100% Silicone. Exclusive of other trim and elastics.