This BIRCHTREE carport is made of 180g Polyethylene, which is waterproof, rot-resistant, and UV protected material. The frame is designed with galvanized high quality heavy-duty steel to ensure the stability and long-term use. Features: HIGH-QUALITY MATERIAL - This BIRCHTREE carport is made of 180g Polyethylene, which is waterproof, rot-resistant, and UV protected material. The frame is designed with galvanized high quality heavy-duty steel to ensure the stability and long-term use LARGE SIZESized at 3m x 6m, the car tent has a large roof canopy to protect your vehicle from light rain, dirt, and other elements. Ground coverage area of 18 square meter. This carport can be erected on both hard ground and soft ground, which is Ideal for car, ATV, boat or temporary tool storage ROLL-UP DOORS WITHOUT WINDOWS - The open design of the car canopy means you can quickly drive your car in and out without the need to open or close doors. Even if without windows, the roll-up font door & back door