Quick - what is the most common complaint about riding off-road in a side x side vehicle? I'll bet you said "the DUST". Install a windshield and roof and you actually compound the problem. In frustration, many have chosen to give up the protection of a windshield altogether rather than be plagued by the dust and heat. After extensive trail testing, Trail Armor has the answer - the CoolFlo Windshield (patent pending). This unique two-piece design delivers relief from back draft dust while providing superior face and eye protection. As an added benefit, it also helps by reducing cabin temperature. Looking to get street legal? Trail Armor's CoolFlow Windshields are DoT Approved/Rated and are engraved with the required markings. How are CoolFlo windshields different from other shields on the market? To answer this, let's look at what creates the problem. An open, roll-caged vehicle lets air flow freely while in motion. Put a windshield on the vehicle and the flow of air is changed - a low pressure zone is created behind the windshield. Ever ride in a jeep or convertible car and wonder why your hair blows forward toward the front or windshield? It is because of this low pressure. Automakers have addressed the issue by adding spoilers to roof racks and rear windows to create an air curtain. This works at highway speeds, but the problem still exists at lower trail speeds. It is this low pressure zone that draws the dust into the cab. By simply removing the lower section of the windshield, air is redirected by special foils downward to the floor and backward into the cab, effectively breaking the low pressure zone and forcing trapped engine heat out of the vehicle. The upper portion of the CoolFlo Windshield stays in place for much needed eye and face protection. What if it's too cold to ride without a full windshield? Leave the bottom part on and take it off later if you need to. Others have tried to fix the dust and heat problem by making half or three-quarter windshields. This only reduces the low-pressure zone; it does not break it. And half windshields do not provide adequate eye protection. So, with a half windshield you have no upper protection, only slightly less dust and the cool air is blown over your head without providing any relief. Trail Armor's CoolFlo Windshields, made of 1/4" mar-resistant, hard coated polycarbonate, provide excellent face and eye protection and relieves the dust and heat for a comfortable ride. They are easy to install, and the lower section can be removed and replaced on the fly.  Fits 2018 - 2021 Polaris RZR XP 1000 Turbo S, 2019 -2021 RZR Turbo S Velocity, RZR 4 XP 1000 Turbo S and  RZR 4 Turbo S Velocity, 2021 RZR Turbo S and RZR 4 Turbo S Lifted Lime LE .