I found what I was looking for... Don't know why I didn't think of it until this morning.. but I started to just go through all of my past messages and I found what I was looking for...
http://www.quiltingboard.com/t-27376-2.htm#573416
It is floor underlayment. I'm going to call some flooring companies to see if they have a scrap of it.
What I'm thinking is using it for my new, bigger ironing board this way if I need to trim something and iron, I have it right there on hand. I'm also thinking of using it on the table that I cut on so if you over cut you don't cut your table ;)
Thanks for your help guys!