This garden polytunnel greenhouse from Outsunny comes with an integrated tunnel and is composed of durable PE cloth over a high-quality steel pipe frame. Thanks to solar energy, poly tunnels with door can maintain consistent temperatures that is ideal to plant growth. The durable PE cover protects the plants in this plastic greenhouse from light rain and pests. The two windows on either side are suitable for ventilation. Features and Benefits LARGE WALK-IN GREENHOUSE: Heavy duty greenhouse is an ideal way to extend your growing season while easily managing your plants in garden polytunnel and protecting them from cold DRAINAGE/CIRCULATION FUNCTION: 1 Large opening adjustable roll-up window on each side of the tunnel greenhouse for cross ventilation on hot days and drain away water and reduce pressure to the greenhouse outdoor frame GREEN PE COVER: Fully closed waterproof UV resistant PE cover maintains high humidity levels for growing tropical plants and allow nourishing sunlight to p