They work much better than my old metal coated foldable sun visor. They are inherently stiff due to the tight metal wires running around the perimeter, which is an ingenious design decision. I drive an RX-350 and they don't fill the entire windshield, but they fill enough to keep the car cool in the summer (I live in the Northeast US). I lower my car sunshades to stay up. The folding process is very simple. Just flip it over and put it in the included pouch.
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