The best choice for weather protection Full windshield is made with ultra-durable 0.177" polycarbonate for long-lasting, high-strength protection and a clear view Roof and most of the rear panel are made with 0.25" HMWPE (High Molecular Weight Polyethylene) The HMWPE rear panel has a cutout clear polycarbonate panel for rear visibility The pieces all bolt together, then attach to the vehicle with galvanized steel, rubber-coated P-clamps. WSHIELD ROOF RPANL RGR150