Looking for a way to get beautiful flat emboidered and pieced blocks? This all natural, tighly felted 100% wool ironing mat does the trick! Dense 100% wool felt has the natural ability to absorb heat so it's almost like pressing on both sides of any block at the same time! The density of the 1/2" 100% wool ironing mat keeps the heat from transferring through to the surface below. Nicely rounded corners keep wear and tear to a minimum and extend the life or your 100% wool ironing mat.