This premium waist trimmer with sweat belt was designed to be used during GYM exercise, exercise or outdoor activities, home workouts, jogging, housework and many more. The sweat belt's contoured fit and flexible neoprene allow for a full 360-degree range of motion during your workout. Premium Quality Makes a Difference Forget those cheap skinny ab belts! The sweat belt waist trimmer is constructed from the highest quality neoprene for superior thermal insulation and long-lasting wear. Important note The sweat belt waist trimmer provides back support. Do not use on open wounds, or if you are susceptible to dermatitis or allergic to neoprene and polyester. Do not wear for more than 2 hours as the fabric is designed to be worn for short periods of time only. Do not wear it while sleeping. If you develop a rash, discontinue use immediately. This fabric often has something similar to a "wetsuit smell". This will dissipate in a short time with washing and normal exposure to air.