Panegy Men's Slimming Vest with Zipper for Weight Loss Muscle Building Cardio Endurance Core Strength Material:90% Polyester and 10% Spandex,which could keep you cool,dry and comfortable during physical exercise. The slimming Vest is close-fitting Slimming Vest Hot Sweat Shirt Waist Cincher Weight Loss With soft and breathable farbic and Quick-drying design,it improves muscle efficiency and reduce muscle tremors and shaking Please check the detail information about size in the picture before buying.