It is good for men to wear boxers. The tightness of wearing briefs and the looseness of boxers have won the favor of many people, especially male doctors who advocate the majority of male friends to wear this style of underwear. Scrotum is very sensitive to external temperature. Sweat glands are rich and there is no subcutaneous fat, which helps to dissipate heat. When the outside temperature is low, it stimulates the contraction of the smooth muscle of the sarcolemma and levator testis, so that the position of the testis is raised, and the scrotum skin shrinks into dense folds, which retract to the perineum to prevent heat dissipation and help to keep warm. The external temperature rises, the smooth muscle relaxes, the testis descends, and the scrotal skin relaxes in vitro, which increases the heat dissipation area and is beneficial to local heat dissipation. Compared with briefs, boxers are more suitable for men's health. Men's underwear generally uses cotton, modal, bamboo fiber, various chemical fibers and cotton blended fabrics, each with its own advantages and disadvantages. Pure cotton fabric: It is generally believed that pure cotton is more comfortable, unless it is pure cotton, some people don't buy it. However, although cotton underwear absorbs sweat, it is not easy to dry, and the skin is exposed to wet clothes for a long time, which is easy to be swollen and itchy. Although it absorbs sweat, it is easy to become the most horrible invisible killer. Modal fabric: Modal fabric is made of natural beech pulp, which is natural and environmentally friendly, comfortable and dry, with good water absorption, good drape and bright and lasting color. Please note: clothes with high modal content are not durable and are easily deformed and broken. The modal content of underwear with ordinary modal fabrics is between 40% and 50%. Bamboo fiber has the characteristics of good air permeability, instant water absorption, strong wear resistance and good dyeability. Due to the difficulty in producing bamboo fiber, this product is rarely seen in the market. The so-called bamboo fiber products in the market are all bamboo pulp fiber products. Tencel fiber is the trademark name of lyocell fiber produced by British Acocdis company, registered in China, and its Chinese name is Tencel. It has the comfort of cotton, the strength of polyester, the luxurious beauty of wool fabric and the unique touch and softness of silk, and is extremely tough in both dry and wet conditions. 100% pure natural material. The clothes made of Tencel are soft and can be washed in many ways, and still remain soft and will not be deformed. It has high dry-wet strength, and the dry-wet strength ratio reaches 85%. It has natural antibacterial, bacteriostatic, acaricidal, deodorizing and anti-ultraviolet functions. Therefore, Tencel fabric is an ideal underwear fabric.