Bali Women's One Smooth U Underwire Foam Cup Bra Cup, Back, Center, Strap: 81% Nylon, 19% Spandex Imported Hand Wash Comfort U back design to keep straps in place Soft cotton straps and center front for a silky smooth feel against the body Smooth look under clothes Provides a uniform shape to both breasts Style 3470; Cup,back, center, strap: 81% nylon/19% spandex. Cup linings, strap pad: 100% polyester. Cup pad: 100% polyurethane foam. Inner center, inner strap: 100% nylon. Center, strap linings: 75% cotton/25% polyester