The stock Winnebago window blinds for the rear windows work pretty well for us. However, I leave them snapped in place 24x7, as I showed here, and they're starting to sag after a few years. So today I added a few more snaps to the top to help with the sagging, and made it easier to unsnap them at the bottom by substituting velcro.
Two new snaps in the center.
I employed the 'velcro snap' method that I showed here.
11-Nov-2020
