Natural LatexHook & Eye & Zipper closureUpgraded Material: Outer Layer: Natural Latex; Inner Layer: Cotton (95% cotton + 5% spandex); 9 Spiral Steel Bones; Protective Cloth: Cotton ( 95% cotton + 5% spandex); Metal Zipper.Please buy with confidence. We offer 30 days free return (return fees at our charge) to every unsatisfied buyer. Our high-quality waist trainer is designed for fitness, slimming belly, tummy control. It can provide more support for the waist back, help to recover back pain and to shape in daily life, etc.ASHLONE zipper waist trainer has 9 spiral steel boning supports which are flexible and durable, and steel bones can be bent easily but recover quickly to origin. 3 rows of hooks below the zipper allow you to hook the ends before zipping. Even more there is a protective cloth made of cotton below the hooks that protects your belly not to be caused irritation while zipping up.The zipper & hooks of ASHLONE natural latex waist training corsets help to reduce 3-5 inches in waist when you wear it. Cotton lining makes you feel comfortable all the day even when you sweat, and natural latex gives you a appropriate tight and squeezed shape.The upgrade compression waist trainer with zip and clips tightens, tones and flattens your stomach. Ideal for running, doing sport, abdomen exercise, fitness in gym and home. Helps for tummy control, body shaping, puerperal slimming and postpartum?recovery. Highly recommended for workout.