are they the ones that are cardboard or the ones that are like gray paper mache?
I'd guess you'd say it was the gray paper mache kind. It's a very loose pressed cardboard, clearly a recycled material. It's about a 1/8 of inch thick. It tears easily and has a nice long burn with no smoke or flying embers, unlike newspaper. I really like it along with the Match Lite as a fire starter. It makes my life easier. Good luck, Lisa