Barely There Women's Invisible Look Underwire Bra - 4104 nylon bras closure Smooth invisible line-free look with flat straps and continuous clean sides. Thinner more flexible foam cups. Soft sueded fabric on outside and cup lining. Quick Change straps for easy adjustability to criss-cross styling. No irritating tag, for the ultimate in comfort and invisibility. Fiber Content: "Inner center belt lining: 100% nylon. Center belt lining, cup linings: 100% polyester. Cup Pad: 100% polyurethane foam. Cup, back: 85% nylon, 15% spandex. Exclusive of trim