Sweat absorbing: Designed to increase your body temperature and stimulate up to three times more sweat during exercise, aiming to help burn fat and sweat out toxins. Shapewear: Get a zipper waist trainer. Sizes: Available in UK sizes 8-18. Material: Made from 70% neoprene, 15% polyester and 15% nylon. Zipper design: The waist cincher features a strong zipper in the middle for a comfortable fit. Neoprene Zipper Waist Trainer | Black | Living Social