|Bali Womens Powershape Back Smoothing Minimizer Underwire Bra 3474 fiber content is Cup, Back, Center: 65% Nylon, 35% Spandex. Center Lining: 100% Nylong. Cup Lining: 94% Polyester, 6% spandex. Back reinforcement, sling: 53% spandex, 47% nylon. Exclusive of trim and elastics. Bali Womens Powershape Back Smoothing Minimizer Underwire Bra 2-Ply Fused back for targeted control Built up back for extended smoothing Minimizes up to 1 1/2 for a slimmer look under any shirt All over smoothing. Bali Womens 3474 comes with 1 Bras per Pack.