Trail Armor’s Rear Window Dust Shield kit provides the most effective barrier for keeping cargo, dust and debris out of the cab of your 2015 - 2018 RZR 4 900, RZR 4 900 S and 2019 RZR 4 1000 S. The upper rear windshield is made from ¼” thick (not 3/16” or 1/8”) clear polycarbonate, making it the strongest and most durable rear window on the market. Unlike some of the other rear windows on the market, Trail Armor’s Rear Window Dust Shield kit has a UV protective coating on the exterior of the window to inhibit yellowing. Additionally, instead of just fitting between the roll cage bars (leaving sizable gaps between the shield and the bars), Trail Armor’s Rear Window Dust Shield kit overlays the roll cage bars for a professional, tight fit as a cab back – essential when used as part of a full cab enclosure for those winter rides - and will not interfere with hard or soft tops. The bottom dust shield is made of ¼” black HMW haircell polyethylene and fits securely between the lower cage and the bed of your vehicle. It will not interfere with any bed function and will accommodate seat belt harness straps. Like all Trail Armor windshields, skids and debris shields, this Rear Window Dust Shield kit is cut with a CNC 5-axis router to ensure a smooth-edged, accurately cut product every time. Trail Armor’s Rear Window Dust Shield Kit for the Polaris RZR 4 900, RZR 4 900 S and RZR 4 1000 S is easy to install and features Trail Armor's new fast clamps. Kit comes with all mounting hardware and detailed, photo-documented instructions.  SEE ALSO FITS CHART IN THE GALLERY FOR SPECIFIC YEAR AND MODEL FITMENT.