More Steel More Stability! RoundTop SUV Boat Shelter. Protect your recreational investments with the 12′ x 28′ x 10′ RoundTop Shelter. Better built using only high grade steel that goes through a 13 step Rhino Shield Surface Prep process. Heavy duty 1-5/8″ 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.