UV Protection-Continuous exposure to the sun will cause high room temperature, aging furniture, and sunburn on the skin. Heat insulation film that can block 90% of UV and 50% of heat. It can perfectly solve this problem, and you will have a feeling of visibly cooler after use. It can also save your air-conditioning electricity bill. Privacy Protection-After sticking the window film, the outside looks like a mirror during the day, and I promise you can t see inside even if you use a telescope. But the inside can still clearly see the outside.