Jim,
I have the one that is easy to clean up but it has been so long since I saw my car that I can't even remember which one it was. I believe mine was some kind of foam or a mixture and after abut 15 minutes you could just wipe it off the carpets if there were any left. Some of the guys with newer cars will know more than me about which is best. To me any one that will work and protect you long enough to get out of the car is good. And if you plan to race it will have to meet the inspection standards.
Ron
