Rear Window Shades 99% Sun Glare and UV Blackout Performance: Our car window sun shade consists of two layers of cloth, one is translucent mesh, the other is opaque shading cloth, you can choose full shading and semi shading modes according to your needs. It can effectively block 99% of the sun, heat and UV rays, and keep you and your family cool and comfortable all the time. ONLY for REAR side windows! Please DO NOT use it for front windows to block the driver's sight. Magnetic Design for Steel Frames: Our car window curtain equipped with powerful magnets at the top, the Magnetic Rear Window Sunshade is specifically designed for use on steel window frames or door frames. Please make sure to check the surface of your window frame or door frame before purchasing. (The power of magnets would be much reduced if your car window frame or door frame is wrapped in plastic or rubber.) PLEASE NOTE it's Not applicable to frameless car windows, such as Tesla's. Designed for Travel: Because this sunshade is a double-layer design, if you want to observe the scenery outside, you can tie the full shading cloth with the ropes on the sun shade. Leave that semi-shading mesh cloth, which will block only parts of sun glare and UV without affecting your vision. If you want better sun shading effect, it is recommended to use both double-layer fabrics. Note the SIZE: The SIZE of this car window shade is 26.7"x19.7"/68x50cm, It is fits most cars such as standard cars, SUV, Minivans and other type cars. But due to the rectangular shape of our sunshades and the varying sizes and shapes of the car windows, if you want full coverage, please confirm the shape and size of your car windows first.