This heavy-duty, waterproof, travel trailer RV cover by Komo Covers will protect your trailer during every season. It will keep it safe from the elements (including snow and rain) along with guarding it against dirt, scratches and nicks. All of our covers feature a roof constructed from a durable 300 Denier woven fabric which is waterproof. Compared to most other covers constructed entirely from non-woven materials that are simply water-repellent, the waterproof roof on our covers provide maximum protection against moisture along with anything else that may fall on your RV. The sides on our covers are made from a non-woven water-repellent 160 gram Fabric which offers excellent breathability. Each cover features multiple air vents to ensure maximum ventilation and reduce billowing. Each cover has multiple draw cords to ensure a tight fit to your travel trailer. Can accommodate an air conditioning unit on the roof.