Size M: Fits waistline 28″-31.5″►►Size L: Fits waistline 31.5″-35.4″►►Size XL:Fits waistline 35.4″-39.4″ WAIST TRAINER TRAINING TRIMMER BELT: Our waist trainer is made of 100% latex-free stretchy neoprene finest fabric, which means it is easy to clean, fits to your body, and will not pitch or irritate your skin. WEIGHT LOSS BELT: Our waist trimmer belt is suitable for sports, cycling and weight lifting.This waist trainer shapewear is constructed with Flex-boning technology to work like a corset or waist corset, with adjustable hook&loop closure waistband.