Today we're going to take a look at the Max Air II RV and Enclosed Trailer Roof Vent Cover, white in color. Now this Max Air II has more open louver area for more fresh air than any other vent cover. It's a very solid, sleek, aerodynamic one-piece design. It does protect your RV or your trailer interior from any rain damage. You can basically leave your vent open with no worries while you're away,… see more >