Crown Wonder-Pro Mat, Rectangular, 36 x 60, Charcoal (CWNWP0035CH) EachWonder Pro is Crown's classic plush olefin mat. It helps protect floors with a vinyl backing moisture barrier. As a wiper, Wonder Pro plays a major role in the retention of water and fine dust so fewer contaminants enter the building. Retains 60% more liquid and fine dirt than most standard mats. Resist fading, staining, mold and mildew. For interior areas with medium traffic.