Flax is an important raw material in flax textile industry, and its fiber is tough, soft, delicate and good in color. Linen fiber is strong, not easy to rot in water and waterproof. In addition, it also has unique advantages such as friction resistance, high temperature resistance, fast heat dissipation, low dust absorption rate, no tearing, no flammability, anti-static, strong acid and alkali resistance. It is the first choice of textile raw materials for environmental protection and is known as the "queen" of natural fibers. It is recorded in various ancient herbal pharmacopoeias. Flax is warm and non-toxic, and has the functions of promoting blood circulation, moistening dryness, expelling wind and removing toxic substances, benefiting liver and kidney, and caring skin, especially for skin treatment, with good curative effect. According to the traditional view of traditional Chinese medicine, China textile experts believe that flax is the cortical fiber of plants, which has functions similar to human skin and has natural properties such as protecting the body and regulating temperature. Linen clothing can reduce human sweating more than other clothing materials, and its water absorption speed is several times faster than satin, rayon and even cotton cloth. When it comes into contact with the skin, it forms capillary phenomenon, which is the extension of the skin. The natural air permeability, hygroscopicity, freshness and dehumidification of flax make it a freely breathing textile, which can reduce the indoor temperature of human body by 4-8℃ at room temperature, so it is called "natural air conditioner". Flax fiber is the earliest natural plant fiber used by human beings. Because of its natural, ancient, noble and high quality, it is called "the queen of fiber". Flax fiber is the only bundle fiber in natural fiber. It has a natural hammer structure and a unique pectin hypotenuse hole. This structure is similar to human pores, which can be opened when it is hot and closed when it is cold. Therefore, it has excellent air permeability, hygroscopicity, freshness and moisture removal, making linen fabric a green fabric that can breathe naturally. At normal temperature, the real temperature of the human body drops by 4 ~ 8 degrees Celsius, and it has the reputation of "natural air conditioning". The use of linen fabric in hot summer makes people feel cool, and can quickly discharge the sweat and heat of the skin, so that the skin can breathe smoothly and stick to the body without sweating. Its moisture-proof and mildew-proof properties protect the skin from bacterial damage. Cold weather will make heat difficult to transfer and keep warm. The investigation shows that linen underwear can regulate the meridian system and endocrine system of human body, thus playing a calming role in the central nervous system; As bedding, flax has a better cooling effect in summer than cotton products. People not only fall asleep easily, but also sleep soundly, which is beneficial to beauty and health. Not only that, because flax fiber is hollow and rich in oxygen, anaerobic bacteria can't survive, and it has good antibacterial performance, so it is a health care fabric. Because of the balance of positive and negative charges, flax has no static electricity and dust adsorption, and its hygienic performance is also talked about. Because of its many advantages and elegant return to nature, flax has become a recognized environmental protection product. Linen series products have been deeply loved by consumers. Especially in some developed countries, linen products are high-grade products, a symbol of fashion and status, and are favored by consumers for their natural and green characteristics. With the improvement of people's living standards in our country, people like the unique concept brought by flax more and more. Denamy Medical Equipment Co., Ltd. of Harbin Institute of Technology conforms to the current situation, takes meeting the needs of customers and improving the physical quality of all mankind as the starting point, and uses nano far-infrared staple fiber and northeast high-quality flax as raw materials to develop a series of nano far-infrared health-care clothing that integrates the comprehensive advantages of far-infrared staple fiber and high-quality flax. Once listed, it has been snapped up and praised by consumers.