Playtex Bra Seamless Cotton Underwire Style # 7523 Caress your curves in cottony comfort that holds all day. Seamless 2-ply stretch cups offer full support. Tailored simplicity, sleek cami straps and underwire styling make this a favorite for every day wear. Fiber Content: Cups, cup extensions, center: 92% Cotton, 8% Spandex. Center lining, cup extension lining: 100% Nylon. Back: 95% Cotton, 5% Spandex. Exclusive of other trim and elastics.