Abba Patio 10 x 20-Feet Heavy Duty Carport, Car Canopy Shelter with Windows and Sidewalls, White Good ventilation: 2 easy open/close zippered doors for cross ventilation and venting on hot days. Three windows in each of the sidewalls, allowing for a brighter interior and airflow on hot days Built with 1-1/2-inch durable rust & corrosion resistant steels frame. Metal corner joint and base plate add for stability UV protection cover and sidewalls avoid overexposure to sun rays. Water resistant material great for commercial fair, picnics, social events, weddings, parties or large storage like cars, boats, motorcycles, ATVs and more Can be placed on concrete, lawn, etc., either hard surface or semi-hard surfaces. Spring pin frame and elastic ball straps design allows for fast and easy assembly with few tools required