The best fabric for swimwear is Polyester. For several years, the polyester fabric has become the first swimwear option for most swimmers. The reason why it’s the best is because of its feel on the body and its chlorine resistance. It’s also comfortable and can quickly dry when outside the pool. Another standard swimwear fabric is Nylon. It’s a popular alternative to Polyester. Unlike Polyester, Nylon has a smooth fit. It’s also light. However, it’s not as durable as Polyester.