Had the regular cutting mat for years and by this time it had quite a few cuts into it from using the same area all the time. Used my revolving cutting mat when squaring up blocks and realized it was a self-healing mat and I really liked it. Seemed I could trim better with it too. So I went searching for a self-healing mat in a larger size to fit my table. Couldn't find one to fit so made a new table to fit the mat.........4' x 8'. Wanted the mat to completely cover the table. Its also reversible so if I do ever damage this side I can always turn it over. One side is the green and the other side is black. Both have the markings on them. Its an Alvin (I think that's the brand name). Smelled terribly when I first got it but now no smell. It also cleaned up easily too as I use Elmer's Glue at times and get a bit messy.