No other mat in the industry traps water and dirt so effectively. WaterHog mats are constructed of rubber reinforced face nubs and the "diamond" design provides crush proof scraping action. 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. Polypropylene fiber system dries quickly and is suitable for indoor or outdoor use. Colorfast: Solution dyed for excellent light and we fastness. Unique ridged construction effectively stores dirt and moisture beneath shoe level. Exclusive "Water Dam" border keeps dirt and water in the mat and off the floor, minimizing slip hazards and floor damage. Green friendly rubber backing has 20 percent recycled rubber content. 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. Easy to clean: Just vacuum or hose off and hang to dry. 1/4" Nub height. Square "waffle" design. 100 percent SBR Rubber backing. Thickness: 0.190" - Nubs; 0.050" - Between Nubs; 0.110" - Border. Testing: Passes Flammability Standard DOC-FF-1-70; Anti-Static maximum average voltage of 1.6 KV as measured by the AATCC 134 Electrostatic Propensity Test and meets IBM?s minimum standard for electrical resistance (NFPA99). ASTM C 1028-29 Static Coefficient of Friction. Dry .70. Bluestone color. Measures 4' length by 3' width.