Fully lined. Shell: 87% Nylon, 13% Spandex. Lining: 95% Polyester, 5% Spandex. Fit: This garment fits true to size. Length: Size small measures 28.5" from shoulder to hem. Bust: Works best for A to C cup sizes. Waist: Fitted - stretchy fabric allows custom fit. Hip: Fitted - stretchy fabric allows room for hips. Undergarments: May be worn with an adhesive bra, petals, or no bra. Fabric: Fabric has some stretch. Beach Casual bodysuit Vacation outfit