Exercise: The waist trainer works to stimulate sweating during exercise, aiming to help burn fat, sweat out toxins and reduce water weight! Design: Front closure with a zip and Velcro provides a supported compression on your stomach and waist. Sizes: Choose your size from UK women's S-M, M-L or L-XL. Colours: Choose from pink, black or blue. Waist trainer: Get a fitness waist trainer. Washing instructions: Hand wash in warm water. Fitness Waist Trainer | Black | Living Social