I made my own wool mat from a beautiful, wool blanket that I have dearly loved over the years. It had been chewed on by my puppies and was buckled from washing and drying it in the machine. I cut it up, made some pillows out of it and used the rest for a pressing mat. The bubble and buckles smoothed out with all of the steaming and heat from the iron and I'm still able to enjoy that blanket. (Pale turquoise and cream, large plaid.)
~ C