1. This men's one-piece underwear is made of polyester, which has good breathability and perspiration function, ensuring that men stay dry and comfortable when wearing it. 2. Fits the hip curve to show men's sexy charm. 3. The back opening design is sexy and convenient 4. The pattern design can effectively enhance the hip line and shape the toned hip contour. 5. Creative gift: a gift for yourself, and also a big surprise to add interest to Valentine's Day, wedding, honeymoon, club, private day, special day, mysterious romantic night, etc.