Bi-level surface effectively scrapes dirt and moisture from shoes, trapping it beneath shoe level to prevent tracking Reinforced rubber nubs prevent pile from crushing and extend the performance life of the mat Solution-dyed polypropylene fabric is resistant to staining, dries quickly, and will not fade or rot Certified high-traction by the National Floor Safety Institute (NFSI) Available in 18 colors with choice of 4 patterns: waffle, diamond, diagonal, or geometric Available with choice of 100-mil or 200-mil SBR rubber