The BRICA smart shade(tm) blends into your car's interior while maximizing top to bottom window shade coverage. The new, slim design mounts to the window sill and automatically rolls up with the window. The smart shade helps blocks the glare that kids really fuss about. It'S ready to use and easy to install. Rolls up and down with most windows*, you can block the glare or let in fresh air helps filter harmful UV-A and UV-B rays easy installation-shade housing safely inserts between window and door panel secure window attachment hooks over top edge of window fits most vehicles-no tools required compatible with most vehicles extra-wide for superior coverage includes one 16.25 In. X 19.25 In. Shade (41.2 X 48.8 Cm)*Installations on some vehicles may not allow the shade to roll up and down with the window as window shapes, sizes and door panels vary.