I buy 6 x 20 tarps on eBay fold and bungee. You can find it and use 4 sides for sun exposure. Then bungee it on.
Just loop and knot so it is easy to pop off and on. Tarps are 22-24 then fee bucks for bungees. Tarps last 3-4 years.
Sounds like effective UV protection, but I’m not sure I’d want to take it off and on every time I use it. That UV is a biscuit! ~~Chip
Around my house that would be a mold incubator.
Takes 2 minutes to put on never had any mold. Just uncovered another boat from last year in fall.