No other mat in the industry traps water and dirt so effectively. WaterHog mats are constructed of rubber reinforced face nubs and the "waffle" design provides crush proof scraping action. Raised, "Water Dam" borders trap dirt and water keeping floors cleaner and safer. These mats are perfect indoors or out, especially outside your front door. The border for WaterHog Fashion features the same 100 percent polypropylene fiber system as the mat surface. Premium 24 oz/sq. anti-static Polypropylene fiber system dries quickly and won't fade or rot. When wet, the rubber reinforce surface allows water to be wicked to the bottom of the mat away from foot traffic while providing a slip resistant surface. Colorfast: Solution dyed for excellent light and we fastness. Unique ridged construction effectively stores dirt and moisture beneath shoe level. Exclusive rubber reinforced face nubs prevent pile from crushing in high traffic areas, thereby maintaining high performance and extending product life. Should not be used in areas exposed to animal fats (kitchens) or petroleum products. Not adversely affected by salt or ice melt. Certified slip-resistant by the National Floor Safety Institute. Recommended uses computer rooms, around electronic equipment, malls, banks, hotels, offices, restaurants, healthcare, supermarkets and more. Highly durable and attractive fashion border makes it the perfect choice for indoor or outdoor applications. 1/4" Nub height. Backing Type: 100 percent SBR rubber (20 percent Recycled Content). Thickness: 0.190" - Nubs; 0.050" - Between Nubs; 0.110" - Border. Testing: Passes Flammability Standard DOC-FF-1-70; ASTM C 1028-29 Static Coefficient of Friction. Dry 0.70. Anti-Static rating averaging 1.2 KV with a maximum average voltage of 1.63 KV as measured by the AATCC 134 Electrostatic Propensity Test and meets IBM's minimum standard for electrical resistance (NFPA99). Medium Grey color. Measures 5' Length by 3' width.