Material:PVCFeatures: The summer is very hot， the sun is very bright. Oh， but I do not like glasses， how to do? Just buy a sun visor mirror block， then all is well.It can effectively prevent the strong sunlight， to see things no glaring . This product is also easy to install， convenient and practical， and acting freely，does not account for interior space.，It can effectively prevent direct light to eyes whether it is in the sun or a sudden lighting from other cars when driving at night，thus it plays an important role in protecting eyes and driving safety. This product is a translucent material， when you block the sunlight， you can also see the scene outside the car， it will not affect the visual ，this design can be described as humane. Tips: Remember to take down the glare mirror when you stop and get off your car to prevent glare mirror deformation because of high temperature!