Material. Cup / Crotch: 100% Pure Silk. Body Fabric: Silk-Cotton Blend (78% Organic Pima Cotton, 22% Silk). Details. Luxuriously crafted in breathable Pima Cotton and lined in silk, this sumptuously soft bra is designed to give an exquisite fit and incredible comfort. The wide ergonomic straps provide support without digging. Underwires are encased in a silk casing, no more chafing or itching. Non-padded