Originally Posted by drppdyllwrngr

yep. can use them with pretty much any material. i put the same set in my wife's car and it's all cloth.

i love mine. they aren't only for cold weather, but come in real handy on long trips to help relax your back. i use mine a lot in the cool mornings. roll the windows down and turn the seat heaters on. within 2 minutes, i'm nice and toasty.

Originally Posted by rolsmojave3

I guess I did use them in a Superduty one day...got to warm and made me sleepy. I don't even use the handwarmers on my sled