【Burn more calories】: Sauna zipper vest with zipper burns more fat than normal sportswear. When you wear it, the sports undershirt maximizes heat storage, promotes blood circulation and increases sweat by 5 times, helping you burn more calories. 【Zipper Design】: The zipper of this workout tanktop is designed to be easy to put on and take off. We use high quality zippers that are strong and resistant to damage. The internal protective material prevents the zipper from scratching your skin or slipping off during exercise. 【Shapewear】: The outer performance compression fabric of our sauna suit keeps the garment closer to our skin, enhances abdominal and spinal support, and ensures that you maintain proper posture during your workout for a better figure and weight loss results. If you want a flat abdomen, the sauna undershirt is the ideal workout gear for you. 【Suitable for all kinds of sports】: Whether you are at home, work or at the gym, this sauna top is very comfortable to wear all day long. The comfortable, lightweight stretch fabric is suitable for running, boxing, cycling,yoga and other various sports. It will become your indispensable sportswear on the road to weight loss. 【Excellent customer service】: Please refer to the size chart to choose your size, if you prefer a loose fit, please choose one size up. Our sauna undershirts provide excellent service, if you have any questions, please feel free to contact us, we will be happy to help you. The FUXERT Sweat Vest is made of 92% polyester and 8% spandex, allowing you to sweat faster during exercise and help you lose weight quickly.