IN-CHANNEL VENT SHADE WINDOW VISOR 4P 91-01 FORD EXPLORER/97 MERCURY MOUNTAINEER Application:1991-2001 Ford Explorer 4 Door Models, 1997-2001 Mercury Mountaineer Models Allows fresh air in while keeping, rain, wind, and drafts out Made Of High Quality Reinforced Acrylic With Light Weight Design, UV-Resistant The deflectors are designed optically transparent with safety in mind, to minimize blind spots for the driver. Easy to install with included 3M adhesive, no drilling required