CWNNR0046CH - Keep those unwanted guestsâ€”dirt and moistureâ€”off the invite list by using Needle Ribâ„¢ wiper/scraper mats. Rugged grooves and ribbed polypropylene needle fibers trap and hide dirt before it enters your building or office. Vinyl edges reduce the risk of tripping, while a vinyl backing helps keep mat in place. Wear-resistant, color-fast design for light- to medium-traffic areas. For indoor use.