Core(100%) Latex; Lining(96% Nylon+4% Spandex)Zipper closureHOW TO CHOOSE YOUR SHAPEWEAR SIZE:If you want to use the waist trainer weight loss everyday wear once you receive it,please measure your waistline and choose the right size according our waist cincher size chart,and the size is RUN SMALL.Do not reply to your jeans or cloth size;HIGH QUALITY METERIAL:Core(100%) Latex;Lining(96%Nylon+4%Spandex). This Waist Cincher will reduce up to three inches from your waist instantly.The rubber smell is temporary and will disappear after 3-5 days(leave your cincher in a well ventilated area). The inner layer is nylon which has been designed to absorb the sweat so that you will not feel uncomfortable.If your skin is allergic, please avoid direct contact with your skin, and it is recommended to wear a underwear under the body shaper;METAL ZIPPER OUTSIDE & BUCKLE / PROTECTIVE LAYER INSIDE DESIGN: This tight underbust waist trainer for women has metal flexible boning, better shape, and full hook, protective layer to not pinch your skin. Adjustable 3 row Hooks & 2 zip for different level of compression, a hook on the top design make Front Zip easy on&off. Latex waist training cincher could help you keep a slim figure and help you lose weight;FAT BURN & LOSE WEIGHT & BACK SUPPORT: This Postpartum waist trainer can tummy Reduces & shapes your Abdomen waistline, Helps define curves, Increases sweating, Flattens your abdomen. If you have lower back issues, our 8 Spiral Steel Bones waist trainers offer lumbar support, help relieve pain and improve posture. Can be used for yoga, postpartum belly abdomen corset, wedding corsets for bride, workout corset waist training, gym waist trainer etc;RISK FREE - Its our top priority to provide you with high quality waist trainer cincher and perfect customer support services. Any question about our corset waist trainer,please contact us freely & we are always happy to serve you.The effective of waist trainer corset: