Sew Easy Wool Large Ironing Mat for Sewing Quilting 10x10inch 100% pure New Zealand wool ironing mat. Essential for any project where precise creases and seams are necessary. Use with or without steam, no black residue left on your iron, grips fabric as you iron. Wool is naturally heat resistant, it repels heat back into your fabric, essentially ironing the fabric from both sides at once! 13mm thick and can easily convert any flat sturdy surface to an ironing board.