SPANX Sweetheart One Piece Swimsuit ` Shell: 70% nylon, 30% Lycra. Lining: 91% polyester, 9% Lycra. Contour cups with underwires and medium graduated, crescent-shaped push-up padding along sides and bottom for cleavage enhancement. Swim-X fabric ensures comfortable shaping and wear. Bond-voyage targets your lower tummy with flexible shaping technology. Smooth knit shaping panel is built into front of suit. XTRA LIFE Lycra resists the damaging effects of chlorine and sunscreen. Fabric-covered elastic straps with adjustable goldtone metal hardware at back. Covered elastic at top of back and around leg openings for fit. Back is lined with soft swim mesh. UPF 50+ protection. Moderate rear coverage.