The kaolin one piece is made with luxuriously soft fabric; composed of 80% nylon, making it incredibly soft, and 20% spandex, which makes it extremely stretchy. This onesie is lined, and does not go see through when wet. It has firm, elasticated seams, so is designed to fit snugly, and is perfect for swimming, diving, surfing, sunning and all that good stuff. The lace up front and back make the suit adjustable for a variety of different shapes and sizes. The thick (2cm) shoulder straps and slightly fuller brief make for a super comfy fit, without having to wory about anything falling out. This design does not have under wire or shapewear.