Material. Cup / Crotch: 100% Pure Silk. Body Fabric: Silk-Cotton Blend (78% Organic Pima Cotton, 22% Silk). Details. Made with super soft Pima cotton, 5 times more breathable than short-staple cotton. Antibacterial, 100% Pure Silk inner crotch. Silk inner crotch: Absorbs and perspires moisture and provides the best feminine hygiene care