Wearing a sports bra can avoid the obstruction of the chest to sports. Because people always sweat when exercising, another function of sports bra is to absorb sweat, ventilate, dehumidify and deodorize, and sports bra is generally elastic, which is convenient for limbs to stretch freely. If the body perspires poorly, it will cause skin inflammation. Therefore, the sports bra makes the breast and body form as a whole, and strongly supports the movement through the model design and the whole chest binding. In addition, the fabric of sports bra is generally cotton, which is elastic and suitable for perspiration, warmth and limb stretching.