Material-Core: 100% Latex,Lining: 100% CottonLatex Waist Shapewear come with 9 pcs spiral steel bones, it will more stiffness and keep you in best posture compare 4pcs spiral steel bones. It's flexible and durable, as soft as plastic bones, can bend easily but recover quickly to originHelpful 3 Hooks Waist Training Corset for Puerpera, Make you Slim and Beautiful.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.High compression. It helps to reduce 4-5 inches in waist when you wear it.Select the size you like with the size map.Or you could read the product description to select the right size you needTo select the size which fit your figure at the most extent,please read the product description of Size. If you are not sure your size,please contact us about your waistline,and we will give you response in the first time