I still think the best covers out there are the factory shipping covers. They're reasonably priced, fit the boat like a glove, waterfroof and felt lined on the inside with all kinds of tie downs. I have two, one for the garage and one for long distance tows. I used to keep my boat outside under a
27' King Canopy with the shipping cover on the boat. I believe this is the manufacturer of the shipping covers,
Trans Shield, but you may have to call the factory or go through a dealer if you're interested.