Our black Felix Rub Off is a high-shine synthetic material with a premium feel and a subtle two-tone finish. But the unisex shoe is still a Doc through and through with grooved sides yellow stitching and our iconic air-cushioned sole that's oil-and-fat resistant with good abrasion and slip resistance. Best of all the shoe's sole is secured using one of the finest methods of construction: the Goodyear Welt.