Understanding Shipping and Handling for ShelterLogic Products Our best-built shed line-up is constructed with high grade steel. Every frame tube and connector goes through a proprietary 13 step Rhino Shield surface preparation process. Heavy duty 1-3/8" all steel frame, bonded with Dupont thermoset baked on powder-coated finish prevents chipping, peeling, rust and corrosion. Advanced engineered, triple-layer, chemically heat bonded enhanced weave, rip-stop, waterproof, polyethylene cover. UV-treated inside and out with added fade blockers, anti-aging, anti-fungal agents resulting in a fabric cover that withstands the elements. High profile white interior creates enhanced illumination. Swedged tubing for quick, slip together easy assembly. Rugged Ratchet Tite Tensioning System provides simple installation while keeping cover tight to frame.