Please Note The outer layer of this product is made of latex and may cause allergic reactions. If you are allergic to latex or unsure, please consult your doctor before use. Our product is a latex waist training vest that flattens the abdomen through compression, creating a powerful shaping effect. Therefore, you will feel a little tight on it, which is a normal phenomenon. You can measure your waist and hip measurements with our size table. Triple Belts Design for Enhanced Perspiring and Fat Burning Our Waist Trainer Vest features a Triple Belts Design, intensifying waist exercises and accelerating fat burning in the waist and abdomen for improved shaping results.