✔HOW 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 3-8 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 & 5 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;