unwanted
You don't need to wear underwear under your swim trunks. The design of swimming trunks has taken into account the comfort and freedom of movement in water, usually using DuPont Lycra, nylon or polyester fabrics. These materials do not sag or swell when exposed to water, and have a thick, stiff and impermeable texture with good elasticity, softness and solidity. If underwear is worn again, it will not only increase water resistance, but also affect the fit and comfort of swimming trunks.
Material and design features of swim trunks
Swimming trunks are usually made of high-quality materials that not only have good elasticity, softness, and solidity, but also have the characteristic of not getting wet. High quality swim trunks usually come with a layer of softer underwear, which is made of a more delicate and soft material, reducing skin irritation during swimming.