You don't have to wear underwear to wear a swimsuit. There are three reasons. First, high-quality swimming trunks are generally accompanied by a layer of soft underwear, but its material is relatively breathable. Secondly, if you wear underwear in addition, underwear made of pure cotton is actually uncomfortable when swimming. Third, the swimming trunks themselves care for the skin more and more. Let's be specific. First, high-quality swimming trunks usually have a soft underwear inside, but the material of this underwear is made of a delicate and soft swimsuit material. Nature has also played a considerable protective role. This kind of closed underwear is more close-fitting and slim, which reduces the resistance to water when swimming. When we swim, whether we wear one-piece swimsuits or split swimsuits, this problem will be involved. This problem has been solved perfectly in high-quality swimsuits. Don't worry, swim peacefully. Secondly, if you have a lot of concerns and must wear underwear, then one problem will be difficult to solve, that is, the underwear we wear is generally pure cotton, which is very absorbent and hydrophilic. Once you enter the water, your underwear will be filled with water, which will not only make you feel uncomfortable, but also make it difficult to swim. Don't do such a thing that is not worth the candle. The important thing is that you swim strangely in the pool. Inadvertently revealing the bottom edge will embarrass you. Thirdly, the materials of swimsuits and swimming trunks are becoming more and more high-tech and water-free. Not only is the fabric more and more soft, but also it is more and more waterless. This fabric is more conducive to your swimming speed and shaping your streamlined lines. The important thing is that this kind of fabric takes care of the body and skin more and more. Make the wearer more comfortable and natural, and also more beautiful and protective. The design details of swimsuits have always been the unchanging scenery of beaches and swimming pools, and it is also a good opportunity for girls to show their good figure.