I suggest a little shopping before buying anything. The mid-grade covers are all made from similar water wicking fabric with zippered corners and adjustable straps. This segment includes Adco, Elite, Expedition, and Formosa.
I currently have a Formosa sold through an Amazon retailer that was half the price of the similar Adco model from Camping World. I had an Adco from my previous travel trailer and can see no significant difference between the mfgt.
There are cheaper, bag style covers (no end straps and lower quality fabric) and there are high quality covers like custom made with sunbrella brand material...both have good and bad points which are a direct connection to price...like a custom cover was quoted at $1,200 for my 37' RV.
Be warned that putting a cover on and removing it is a big pain in the rear - but well worth the protection they yield. Best of luck
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV