KIRKLAND SIGNATURE BY MIRACLESUIT ONE PIECE SWIMSUIT VARIETY MIRACLE SLIMMER Back & Underfront: 54% spandex, 46% nylon. Front Drape & Lining: 83% nylon, 17% spandex. Cup Lining: 100% polyester. Cup Foam: 100% polyurethane. One piece swimsuit. Crossover. Shirring on left side. Padded bra cups. Slimming design.