Playtex 18 Hour Cotton Blend Cups Bra Style # 4170 Finally a cottony bra with comfortable support! Beautiful lace accents with satiny stitching on cotton-blend cups offer a contemporary look. Comfort straps provide relief from strap dig-in. Fiber Content: Cup Center Band Cushion Strap: 55% cotton 45% polyester. Cup Lining Cushion Strap Lining: 50% cotton 50% polyester. Center Band Lining Frame: 100% nylon. Back: 81% nylon 19% spandex. Fiberfill: 100% polyester. Exclusive of other trim and elastics.