3M(TM) Nomad(TM) Heavy Traffic Carpet Matting 8850, Checkers (Gr/Rd) 4 ft x 6 ft, 1/case Entrance Carpet matting designed for heavy traffic applications. The dual fiber construction traps, holds and hides dirt and moisture. Checkers, 1 mat per case. 3M(TM) Enhance(TM) Matting 8850 features a patented dual-fiber design: large, crush-resistant polypropylene fibers that scrape, remove and hide loose dirt; and small nylon fibers that wick away water from foot and wheeled traffic. It should be used as a last mat of a 3M entrance matting system.