This is my first time purchasing a non-generic one -- Covercraft's is "custom" cut to a specific car's windshield size so there are no gaps or corners exposing the interior to sunlight (save for a tiny bit on the sides that's necessary to install/remove the sunshade).
The material doesn't bend at all, except at the creases where it's supposed to (to fold the sunshade up for storage). It's extremely thick/durable and somewhat heavy. The thickness is likely better at preventing the car interior from heating up, but when installed with the sun visors down, the sunshade weighs on the sun visors a bit. I am slightly concerned about the visor hinges getting loose over time because of this, but I'm probably just being paranoid!
