The TMF04 protective suit adopts the principle of "oil repellent adsorption", and the inner protective layer is made of polyacrylonitrile activated carbon fiber independently developed by our institute. It is compounded with cotton, aramid and other base fabrics through glue, and has the advantages of good breathability, light weight and good flame retardancy; The outer layer is made of polyester fabric, which has been treated with flame retardant, oil repellent, and water repellent properties.