For quilting at home or on the go. Mountain Mist 2 in 1 Wool pressing mat offers all the flexibility you need to quilting wherever you want to craft. This 2 in 1 mat is 18 inches X 24 inches with a 13 1/2 inch X 13 1/2 inch removeable center. The mat absorbs heat so when pressing your quilt block,s it is like pressing on both side of the fabric at the same time. It has a dense 1/2" thich tightly felted mat.