I put one layer of warm & natural and then one layer of the insulbrite and then topped it with a heavy cotton twill for my "big board" and it works great. Mine is all stapled onto a sheet of plywood & sits over my regular ironing board. IF the top gets too discoloured, I will just add another layer of the cotton twill. I don't like a really soft surface to iron on and this is perfect for me. Good luck with yours!