Made Using Durable Materials: Our waist trimmer is made using natural rubber and nylon. It is elastic, non-irritating to the skin, durable, and the outer layer is made of elastic polyester fiber with a meshed design that allows for ventilation and sweat absorption. | Aids Slimming and Prevents Injury: Our waist trimmer belt is ergonomically designed to prevent stabbing or jabbing that you may experience when wearing other stomach belts. It can help you to sweat during exercise and accelerate abdominal fat burning. it can also provide core muscle protection to prevent physical injury caused by strenuous exercise. | Waist Trimming Design: Our weight loss belt is wide enough to wrap around the abdomen and will stay sturdy during exercise. It is thick enough to generate heat and promote fat burning and long enough to wrap around entire waist with hooks that ensure your belt is firmly fixed around your abdominal muscles at all times. | Unique Breathable Design: The back of our waist trainer shape belt has a meshed hollow design that gives you space to breath and feels more comfortable when you generate heat and burn fat during exercise | Multifunctional: Our belt can support injured back muscles and relieve soreness making it also suitable for postpartum recovery, weight loss training, abdominal training, and can also support your back to help keep posture when you sit down for long periods of time.Note: If your waist is between two sizes, please choose the larger size.