The New and Improved Maxxair FanMate is THE recommended rain cover for Fan-Tastic Fan, MaxxFan Standard, ShurFlo Comfort Air or any other high volume RV roof ventilator! The FanMate gives you superior rain protection with less than 5% airflow restriction, and easy access to your fan vent courtesy of the EZClip pins and mounting hardware provided with the cover. The MaxxFan 855 is a white translucent cover, allowing light to filter down through the vent opening.