Dr. Martens Jorge II Patchwork Nubuck Leather Slingback Mules in Savannah Tan. Part shoe, part sandal: the Jorge II mule is all about easy wear and everyday versatility. This pair is built with nubuck uppers and set on our classic Shore sandal sole. Ready to go all summer long. Two adjustable straps ensure a comfortable fit. Yellow welt stitching will mark you out as a DM’s wearer.