Made of heavy-duty steel, the frame of storage shelter is sturdy for durable use. And the poles of frame are bonded with a premium powder-coated finish which prevents chipping, peeling, rust, and corrosion. In addition, the whole canopy is connected with strong and thicker accessories so that the frame is stable after setting up. With premium PE cover, the shelter is sure to provide protection against rain, snow and sunshine for your items such as tools, firewood and small vehicles. The door with double zippers is for convenient access and it also can be removed. Most of the poles are connected with buckles for easy installation. You don't have to spend too much time to assemble the canopy if you set it up with other people.