My car gets hot. Park in a huge concrete lot every day for work, and no shade.
Black car, black leather...not pleasant to get into each afternoon in this TX heat, even with tinted windows and a windshield shade.
So...I came across
THESE on ebay. Unable to spend $100 for some shades, I diy'd em.
Literally, a box, a knife, some tape, few sheets of white paper, and 2 suction cups. Had all that in the garage.
45 min later I had these bad boys put together. Don't have before/after temps inside the car, but it is significantly cooler now! Looks like shit, so I'll eventually 'pretty' em up, but hey, they work!!!