It's built with a robust frame made of galvanized steel tubes and a durable PE covering.
The air inlets, included on the sides to ensure good ventilation, along with having a practical drainage function when there is heavy rainfall.. Outsunny 20x10x6.6ft Heavy Duty Outdoor Walk-in Tunnel Greenhouse Portable Garden Planting Warm House with PE Cover Green | Aosom Canada Ideal for cultivating plants, flowers, vegetables effectively in all seasons, it protects crops from cold, frost, and hail in winter and stimulates growth in spring and summer.