Skims Waist Trainer Brand New! SUPPORT LEVEL Extra Strong DETAILS This hourglass waist trainer from SKIMS sculpts perfectly to accentuate your body’s natural curves. This seamless sculpt waist trainer is a wardrobe essential for shaping your waist, and helping you achieve your ideal silhouette. Designed from ultra-thin, high-tech neoprene that’s soft to the touch and undetectable under just about everything.