Dr. Martens Sinclair zip up platform boots. These classic boots feature a zip closure front. Ankle height leather boots with yellow welt stitching and tons of Docs attitude. With their classic yellow-stitched bouncing soles, and iconic '90s grunge styling, British boot-maker Dr. Martens is known for ultra-premium craftsmanship. With cushy soles and mandatory break-in period, these classic leather goods are lifers, for sure.