DR. MARTENS. R11853201. 2976 CRAZY HORSE. GUACHO. The Dr. Martens 2976 Chelsea boot is a slick uncompromisingly fashion-forward look for both men and women. Made with naturally distressed Crazy Horse leather this easy-on easy-off boot serves up a sure fit with its signature elastic ankle gusset. Made with all the classic Docs DNA including grooved sides heel-loop and visible stitching. Built on the iconic Dr. Martens air-cushioned sole which is oil and fat resistant with good abrasion and slip resistance.