UV Blocking and Heat Control - One-Way Window Film with UV-Blocking solvents effectively blocks 95% of UV rays, reducing fading and aging of interior furnishings. It also helps prevent sunburn, anti-aging, and freckles by blocking harmful ultraviolet rays, the primary cause of skin aging. Additionally, the film blocks 85% of infrared rays, retaining heat in winter and keeping interiors cool in summer, thereby reducing heating and cooling costs