Use it in my RV windows during cold weather. Works great. Use a scrap as a sit pad, keeps my bum warm(er) in the snow. larger pieces work as sleds!
I've used a piece under my legs successfully. Don't know if I'd use it as a pad replacement, since it's plastic...
RV supply stores typically sell it off a 4' wide roll by the foot if you want some...
"Do or do not, there is no try." -- Yoda