4x20 Entrance mats and runners quickly transform slippery floors into safe walk surfaces. Use 4x20 carpet mats as indoor mats on hard floor surfaces to wipe shoes dry. Use 4x20 floor mat runners designed to scrape shoes clean as outdoor mats and in areas where it is imperative to stop dirt at the door. An entrance outfitted with a 4x20 walk off mat as an outdoor mat and a 4x20 carpet mat as an indoor mat will stop approximately 75% of the dirt and moisture at the door. Keep your walkways safe and clean with 4x20 floor mats.