Polarized Anti Glare Visor: Features polarizing technology to filter out the reflected light, any visual discomfort of driving during the day and night,Our car sun visor blocks excess glare and harmful UV rays,allow you have a vision even in the extreme sunlight to safe driving. No Visual Discomfort: Our Car Sun Visor Extender is big enough to cover all your sight, with no space between the sun visor and your extender, ensures consistent visual and color alignment. Clear vision with no distortion ensures driving safety and comfort to the greatest extent. HOW TO USE IT:The zipper design effectively locks the visor position and pull-down length.Zipper switch to avoid fingerprints.Just adjust the Angle of the zipper to more than 90 degrees,the lock be opened;If the zipper fluctuates less than 90 degrees,the zipper be locked.The clever design is that once the zipper handle ends at an Angle 90,you not be to open sun visors for cars,You have to turn back the sunshade zipper handle. SUNSHADE EXPANSION:The sun visor for car sunshade extension is to block the light of some rear passengers of the car in the case of direct sunlight journey,so as to achieve relatively soft exterior light conditions for rear passengers.sun visor extender for cars also has the automotive interior sun protection.This extension reduces the glare of the car's high directly across the front glass and the low Angle of the sun in the early morning or evening. Material: PU+PC colour: black Package Contents: 2 x Polarized Sun Visor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.