A few years back, I purchased a winter storage cover from a large online merchant. It was cut to cover a boat with a raised tower or t-top and made from a reinforced polymer waterproof material. I used it as an alternative to shrink wrapping and it lasted a couple of seasons before weathering and wind wore it out. Even at that, it was economical compared to shrink wrapping. Has anyone seen or used such a cover recently?

There are a few advertised on the said online merchant now but reviews indicate that they aren't completely waterproof.

Thanks