NoTrax Heritage Rib heavyweight double rib high/low design removes debris from shoes. Ribs run length of mat. 24-oz. needle-punched yarn per sq. yd. Vinyl backing helps reduce mat movement. Only 3/8in. thick to function in narrow clearance doorways. Ideal for indoor use in entryways, lobbies and medium traffic areas. U.S.A.Available in Brown, Charcoal and Green.