How comfortable is the car seat cushion? The main function of car seat cushion is to protect the car seat, beautify the car and bring comfort to drivers and passengers. Different car cushions have different functions and styles. Among many car cushion materials, flax cushion is made of pure natural materials, and flax has the remarkable characteristics of sweat absorption, good permeability and no harm to human body. Linen fiber is the oldest textile fiber in the world. Linen fiber is tough and soft, and its strength is 1.5 times that of cotton fiber and 1.6 times that of spun silk. Flax fiber also has the unique advantages of strong hygroscopicity, fast heat dissipation, friction resistance, high temperature resistance, incombustibility and crack resistance, low electrical conductivity, low dust absorption rate, bacteriostasis and health care. Because flax has a series of unique advantages, flax materials are also widely used in car cushions. The heat dissipation performance of linen cushion is 5 times that of ordinary ice silk cushion and 17- 19 times that of cotton cloth, and the heat absorption is slow. The temperature of flax seat cushion is 3-4 times lower than that of ordinary car seat cushion, and now most of the seats on the market are made of flax. However, it should also be noted that there are many fake and shoddy linen products, which need to be carefully selected and identified when buying. Flax contributes to the electrolyte balance of human body. The research shows that flax can reduce human perspiration by about 1.5 times compared with other cushions, and its hygroscopicity is better, which is equivalent to 20% of its own weight. Therefore, linen cushions are very suitable for the high temperature in summer, which is why many car owners choose linen car cushions when summer comes.