Waist Cinchers by YIANNA. Details:This hourglass waist trainer corsets belt Increased body heat helps to trim you, removing excess sweat / water weight during exercise, while the light-weight material s heat stroke. Designed for fitness alongside your collection of workout equipment B.a special interior grid surface to slipping, bunching;Comfortable, light-weight, stretchy fabric stays in place while performing any activity C.Perfect curve design Helps to provide you the best support to abdomen and Lower back,making it the perfect body shaper and avoiding hard trainning wihout a proper core muscle protection.