Material. Cup / Crotch: 100% Pure Silk. Body Fabric: Silk-Cotton Blend (78% Organic Pima Cotton, 22% Silk). Details. Pima cotton shell provides super-soft support and is both luxuriously soft and incredibly strong. Fully lined in Mulberry silk for unbelievable softness against your skin. Intricate floral embroidery and delicate mesh overlay. Underwires are encased in a silk casing, no more chafing or itching. Non-padded