Spectra-Rib Olefin Carpet Mat. Ribs that scrape, valleys that hold dirt and moisture. Ribbed carpet surface wipes shoes better, saves on clean up time of your floors. Shaded carpet effect brightens your entryway. Features: High fashion look and feel of fine carpet, yet is an extremely tough carpet mat, 26 oz. of deep rib 100 -percent polypropylene needle punch fibers per square yard permanently fused to a 75 mil solid vinyl backing, scrapes shoes clean; is easily cleaned with a vacuum, hose or broom, use inside or outside; stands up to the toughest foot traffic situations, slip resistant solid vinyl back protects floors, reduces mat movement and Made in the U.S.A. SPECTRA-RIB MATS's approx. 1" vinyl border on all four sides. Ribs run parallel to long dimension of mats.