1,high visible light transmission 2,high UV reduction 99% 3,clear and comfortable eyesight effort Hangzhou guangke ... energy costs.4.Enviromental protectioninsulate at least 99% of harmful UV rays, reduces interior fading (furniture, wood floors, rugs and paintings ... when the scraper wiper Sometimes the color will be off themselves, such membranes will lose color in the year, and fade more obvious ...