Hanes Synthetic Full Figure Sports Bra # G470 Cup, back, strap: 92% nylon, 8% spandex. Strap lining, inner cup frame lining: 100% cotton. Strap pad, cup lining: 100% polyester. Inner cup frame: 100% nylon. Exclusive of trim and elastics. sports-bras closure Cup, back, strap: 92% nylon, 8% spandex. Strap lining, inner cup frame lining: 100% cotton. Strap pad, cup lining: 100% polyester. Inner cup frame: 100% nylon. Exclusive of trim and elastics. Hanes