Material. Cup / Crotch: 100% Pure Silk. Body Fabric: Silk-Cotton Blend (78% Organic Pima Cotton, 22% Silk). Details. Expertly crafted in Pima Cotton and delicate two-tone lace, this high-waisted brief is full of feminine flourishes and provides all-day comfort.. Pima cotton is naturally hypoallergenic. This will make it unlikely to cause an allergic reaction or skin irritations and will be resistant to carrying allergy-causing microbes.. 100% Silk Gusset is naturally moisture-wicking, hypoallergenic and anti-fungal for all-day freshness