The Brabantia viscose underlay makes ironing a lot easier. It'll be a lot faster and smoother, and it will deliver better ironing results. The underlay fits every iron, and is suitable for normal ironing or steam ironing. The extra underlay makes it easier to iron over bumps, such as buttons and zippers. The soft foam underlay makes the buttons recess slightly into the ironing board cover. That means they won't stick out and you can iron over them effortlessly.