RoundTop Tough All Weather RV Protection. Secure your recreational vehicle with the better built RoundTop Shelter. Every frame is built with high grade steel that goes through a 13 step Rhino Shield Surface Prep process. Heavy duty 2-3/8″ diameter steel frame is bonded with Dupont thermoset baked on powder coat finish that prevents chipping, peeling, rust and corrosion. Triple-layer, polyethylene, rip-stop weave fabric cover is hot air fused at the seams and 100% waterproof.