For "sports men", exercise can also improve the level of testosterone, promote sexual desire, help blood vessels to be unobstructed, and accelerate blood flow, thus enhancing the ability of penis erection. However, if you wear it improperly during exercise, it will also damage men's sexual ability. Exercise consumes physical strength and raises body temperature, while traditional underwear is airtight and partially resembles a small steamer. The increase of temperature leads to sperm deformity and necrosis in scrotum. Scientific research has found that this will have a negative impact on the reproductive health of "sports men". Most people like to wear sweat-absorbing cotton underwear when exercising, which is also unscientific, because cotton "absorbs more sweat than it does, but it is not enough", which is also a male killer. Experts suggest that to solve this contradiction, you can wear a U-shaped sports bra. The underwear is designed with a scrotum bag made of silk fabric, which can protect testicles from the influence of external temperature and humidity, absorb and release moisture, sweat and secretions discharged from the skin, and keep the skin clean. U-shaped sports bra is especially suitable for long-term sports and outdoor activities such as golf, fitness, spinning, yoga, etc. It is comfortable to wear and can protect male reproductive health.