The U1500WH Ultra Breeze Fan-Tastic Vent Cover has revolutionized the design of vent protection devices. Not only does this Fan-Tastic Vent Cover allow you to keep vents open even in the rain, but exclusive patent pending airfoil technology allows for 75% more airflow than competing RV products. The Ultra Breeze has been field tested to provide superior protection for your RV's vents while allowing between 95-100% airflow. Add a Fan-Tastic Vent Cover to your RV's vents today! Have questions about choosing a vent cover? Contact our team today!