Composition: 100%polyesterSpecial Features: Easy to install and remove Full transparency Always in perfect shape Easy to clean; maintenance-free Remains fresh and new Flame-retardant UV-resistant It is so easy to use and just need three-steps. 1, Make the window frame clean ; 2, Stick the stickup tape on the windows' frame,; 3, Press the fly screen on the tape; That's it! No need of sewing. They are very popular in America and Europe.