Hook and Eye closure. Hand Wash. 4 piece cup. Second skin lined cups. Lightweight padded comfort straps and smooth back wings. Lace - 81% Nylon, 19% Spandex; Back Wing - 74% Nylon, 26% Lycra Spandex; Back Wing Lining - 83% Nylon, 17% Spandex; Top Cup Lining - 88% Nylon, 12% Spandex; Cup - 100% Nylon. Imported.