The chemical name is polyester film. Characteristic is the texture is more hard, more resistant to scraping, long time use also will not like PVC material turn yellow out oil galaxy S4 protective film. But the general Pet protective film is to rely on electrostatic adsorption, more prone to foaming and shedding, but even if the fall off in clean water can be reused. The price of pet material Protection film is much more expensive than that of PVC. The use of PET material protection paste work and packaging is more exquisite, there are specifically for hot buy mobile phone models to order the protection stickers, do not need to cut can be used directly.