With visible light transmission at 5%, the effect of this window film will be very dark, blocking 95% of UV rays and 85% of IR rays, blocking most of the sun's rays, reducing heat transfer, keeping cool in the summer and keeping heat in the winter, helping to reduce heating and cooling costs. Providing excellent privacy during the day, Privacy Control Window Film's mirrored reflective design allows others to not see any of your interior from the outside, effectively protecting your private space. With it you and your family enjoy a more comfortable and cooler summer.