Lover-Beauty Women's Zipper Latex Workout Corset Waist Training Cincher Latex,Cotton Zipper closure Material:96% Cotton+4% Spandex, 100% Latex 5 steel bones latex waist cincher, which is more durable than plastic bones Zipper front can tight your belly to ensure that you would look slimmer when you take it Zipper Waist Training Cincher is a good friend when you take exercise,cotton lining ensure that this waist trainer is a sweat-absorbent underwear which means it could help you burn your axunge and help you lose weight For best results measure your waistline above your belly button and choose your size by using the size chart in the image,but do not use the default Amazon Size Chart. Want to know more about the size,please check the product description