It doesn't make much difference if it's an ordinary swimsuit. Unless you wear Speedo's shark suit, it is a high-tech product from the first generation to the fourth generation. World-class players use it to break records.

"Shark skin" is modeled after the real structure of shark skin, and millions of tiny ratchet teeth are arranged on the surface of swimsuit. When water molecules flow along these ratchet teeth, countless micro-vortices will be generated, which will push back the separation point of the "boundary layer", thus delaying and weakening the formation of wake vortices. Since then, no matter how many generations, it has only one goal-to reduce water resistance.

Male swimmers used to wear one-piece swimsuits, which looked strange before 2000. Now, you can hardly find a male swimmer wearing only shorts unless he doesn't want to win. For male athletes, even if they don't wear one-piece swimsuits, they should at least wear the "trouser version". This trend began with "shark costume".