RV Cover fit Xtra tall 40'-42' Class "A" RV, Travel Trailer RV, Toy Hauler RV RV Cover fit Xtra tall 40'-42' Class "A" RV, Travel Trailer RV, Toy Hauler RV Designed and manufactured to be the best polypropolene RV cover on the market. This triple layer cover offers outstanding protection against the elements. The cover also breathes to prevent condensation and mildew Zippered panels allow access to any part of RV when cover is on.