MaxxAir Maxx II Vent Covers are the ideal way to keep rain and other bugs out while still allowing fresh air to flow through your vents. This Maxxair vent cover adds a sleek, aerodynamic and modern look to your RV. Its innovative design provides fresh air ventilation, while protecting you and your family from rain and preventing leaves, bugs and other things from coming in. Its constant airflow prevents heat build-up. They're made of high density polyethylene and are UV protected so they will last for years. And it looks great on any RV!