More my style, but what I am looking for would be similar to a shower cap but obviously engineered for a helmet. Maybe this weekend I'll find out if I have a problem. It is just that when I look at my new GIRO G10 helmet, it sure looks to me that rain would come through the straight upright topside vent holes, even with the vents closed.
I must admit though, that skiing in Utah this winter in blizzards I had no leaks and I have to believe that escaping heat would melt the snow that fell into the vents.
I fear underdeveloped snow this weekend at Snowy Luau so I guess this will be the test.