I registered just to answer your question. Pretty neat aren’t they? $5 “Side Window Shade” from AutoZone. Thanks to a pair, my goose remained uncooked on a sunny 2000 mile cross country across-the-country trip in a new-to-me canopied motoglider recently. The frames are very flexible and they twisty-foldie into a 6" x 6" bag. As you can see in the photo, the fabric is a bit delicate, so it’s rather easy to pull the suction cups through, but make a new hole and you’re good to go. The best $/value ratio I’ve ever spent on aviation!