3x20 entrance mats when used as runners provide a safe walk surface for customers and employees. Use a 3x20 carpet mat runner when moisture is a concern. If stopping dirt and particulate matter is a primary concern, use a 3x20 floor mat designed to scrape like our Waterhog, Chevron or Dual rib floor mats. With bad weather around the corner it is wise to plan ahead. Keeping 3x20 entrance runner mats onhand will help to protect your building from the threats of slips and falls.