600 Denier Sur Last water-resistant material easily attaches to vehicle with quick release buckles and hook-and-loop straps. Large rear window zips open for increased airflow,Creates a full enclosure when combined with the KQR Soft Upper Door Set (99994-1056) and one of three windshields: Flip-Up Polycarbonate Windshield (99994-1054), KQR Full Polycarbonate Windshield (99994-1052) or KQR Full Glass Windshield (99994-1053),Soft Rear Panel does not require Soft Upper Door Set but should be used in combination with a windshield,Towable on open trailers when used in combination with any full windshield (Flip-Up Polycarbonate Windshield must be in the closed position) and the KQR Soft Upper Door Set Vehicle must be positioned in the forward facing direction when towing Remove for towing on an open trailer if KQR Soft Upper Door Set is not installed Compatible Models: MULE PRO-FXR 2018,2020,2021,2022,2019,2023 Compatible Models: MULE PRO-FXR 2018,2020,2021,2022,2019,2023