I just wanted to add to this conversation for future pilots researching covers. You don't need to mail order to China for Kerry covers. I bought mine from Northeast Sailplane in Ohio. (Might not be in business as I can't a website now??)
Secondly, tonight I just did a UV test on the material. I had recently cut out a section to install a clear vinyl window over my solar panel. I placed the removed material over my UV mineral lamp and moved it right next to a mineral that flouresces brilliant green under UV. It remained totally dark, even testing in a dark room! So these covers really do protect your finish from UV light. I am very happy with these covers. They seem to be totally waterproof too, yet breathable via bottom side mesh. Well thought out. And way less $$ than Jaxida.