RC Willey knows that every office needs a chair mat and this one for hard floors will be perfect for your home. Chairmats are more than a piece of plastic under your chair. Chairmats protect floorsand a floors warranty. Most manufacturers of flooring require use of a chairmat under a chair with casters, or else the warranty is void. Chairmats also provide a smooth rolling surface. Try rolling on a carpet. It takes 78% percent more energy to move a chair on carpet than on the smooth surface of a chairmat.