Okay, so you know how when you go to the pool, you wear your bathing suit, right? Well, a long, long time ago, people used to swim in their normal clothes! Can you imagine trying to swim in pants or a dress? It would be very hard!
But then, people started to realize that they could swim faster if they wore special clothes just for swimming. These clothes were called swimwear. At first, swimwear was just basic and not very fancy, like shorts and a t-shirt.
But as people started to compete in swimming races, they wanted to wear swimwear that would make them go even faster. So, companies started to make special swimwear just for racing. These special swimsuits were made out of special materials that were really slippery and helped the swimmers glide through the water better.
Over time, swimwear continued to evolve and become even more high-tech. Scientists even started to study how water moves around the body when someone is swimming and used that information to make even better swimwear.
Today, competitive swimwear can be very expensive and is made out of some pretty advanced materials. But even if you're not racing in a big competition, it's always important to wear swimwear designed for swimming, since regular clothes can weigh you down and make it harder to move through the water.