Latex Hook and Eye closure Hand Wash Only 10-diffrent sizes for choose, please measure waistline and read the size chart firstthanks Womens latex waist trainer shapewear: Big and wide 3 Hook and Eye Closure allow for size adjustment, give you more choice to wear; 9 Spiral steel boned for waist cincher support and keep you in best posture which is flexible and durable, as soft as plastic bones, can bend easily but recover quickly to origin; If you worried about steel boned or not, you can test it with a magnet ; Can be used for yoga, postpartum belly abdomen corset etc. Upgraded 3 layers fabric: Inner layer constructed with soft and cozy 96% Cotton+4% Spandex; Mid layer of 100% latex; Outer layer of durable Nylon+ Lycra & spandex; Covered boning in front and back for added support, smooth waistline,3 columns hook-and-eye closure classic design, alow you to adjust size as necessary; Make you Slim and Beautiful.