Kirkland Signature by Miraclesuit&reg; Ladies' Swim Skirt-Black Body: 54% Spandex, 46% Nylon. Skirt & Lining: 83% Nylon 17% Spandex All over slimming control. Innovative fabric, Miratex provides triple the holding power. Constructed to shape and form the body without bulky linings. Moderate leg opening.