Lightweight and Portable Material: The sauna jacket is made of 96% polyester+ 4% spandex, which makes it lightweight and easy to carry around. Comfortable Fit: The middle zipper of the sauna sweat top provides a comfortable fit, and the loose fit design allows plenty of room for movement during exercise. Elastic Thread Closure Design: The cuffs and hem of the sauna shirt are designed with an elastic thread closure, which effectively locks in body temperature, keeping the body warm and increasing sweat to enhance the exercise effect. Sweat Activation: The sauna jacket is designed to raise your body temperature immediately and activate sweat glands quickly to help you get sweat, making it a good choice for workouts. Easy to Clean: The sauna jacket can be hand washed gently in cold water and hung to dry in a dry and ventilated place. It should not be ironed.