This waist trainer is designed to help you sweat and shape up. It's made from neoprene material that traps heat, raising your core temperature during workouts to help you burn fat and sweat more. The double-belt design is key: there's a wide inner belt (25cm) that targets your upper and lower abdomen, and two outer elastic bands (12.5cm each) for extra compression and support. You can adjust the tightness with the hook-and-loop closures to get your perfect fit. It has 7 flexible steel bones built in to support your back and waist, help improve posture, and reduce back pain - great if you sit at a desk all day. It also helps prevent the belt from rolling up. Suitable for both men and women, whether you're into fitness, postpartum recovery, or just want some extra core support. Note: it contains latex, so avoid if you have a latex allergy. Start by wearing it 2-3 hours a day. Check the size chart carefully, and if you're between sizes, go up one.