Fiber Content: "Top Cup, Strap: 57% Polyester, 28% Nylon, 15% Rayon. Bottom Cup, Side, Center Belt: 76% Nylon, 24% Polyester. Top Cup Lining, Center Belt Lining, Strap Lining: 100% Nylon. Bottom Cup Lining, Side Lining: 100% Polyester. Center Back: 68% Nylon, 32% Spandex. Exclusive of Trim and Elastics."