Polyester fiber fabric is harmless to human body. Polyester fiber, polyester fiber is polyester, and its chemical name is polyethylene terephthalate. Theoretically, it has a large molecular weight and will not be absorbed by the human body, which is very environmentally friendly. But try to buy regular brand products, because the recycled raw materials and post-treatment process of small factories will be polluted. Polyester is a kind of spinning synthetic fiber formed by polycondensation of organic dibasic acid and diol, which is widely used in clothing fabrics. It has excellent wrinkle resistance, elasticity and dimensional stability, good thermal insulation performance, and is widely used, suitable for men and women to wear.