Helpful Hook and Loop Attach the included Hook and Loop to the shade and the door jam on your vehicle where it is slipping Secure the window shade for the perfect fit on either front or back doors regardless of shape The Wing Mirror-Fitting Hole Adjust the shade so the entire window is covered and the shade fits tightly around the window PREVENT ANY SLIPPAGE BY STABILIZING THE SUNSHADE WITH A HOOK AND LOOP! How to install car window shade First align the car window from the top. Second cover the window tightly with car window shade. Last line the hook and loop tape for the perfect positioning then stick on it with shade. Based on the laws of some states it does not allow anything to block the view mirrors when driving you should be clear about local terms and conditions first.