[Shaguar47]

I know it's not that cold down here, but still, I find it to be a rather good idea nontheless. But I still warm-up my car and all, but by the time I get to school which is a 15 minute drive, my heater and temp will finally reach warm. And 1phatcx is right, cardboard is great cause I used it once when it was about 6 degrees and I actually noticed that the car warmed up quicker than usual. That's why I'm thinking I should just make this for the winter and take it off when it warms up. it's worth a shot.