The Dr. Martens Unisex Sinclair Boot is a side-zip lace-up platform boot from Dr. Martens' edgier lineup. Premium leather upper, side-zip closure for easy on/off, Goodyear-welted construction with yellow stitching, and a chunky platform sole. The Sinclair pairs the brand's heritage construction with a streetwear-leaning silhouette.Fit notes: Dr. Martens uses whole UK sizes and says most styles run true to size. If you are between sizes, the brand recommends the larger size with an insole to take up the half. Break-in is 1–2 weeks. The platform sole doesn't change foot fit — only height.Authentic Dr. Martens, shipped from Feet Heart — authorized Dr. Martens retailer. Free U.S. shipping, free returns, fit help at (310) 398-7497.