The simple lines of the 8-eye Keelan boot is even more summery, inspired by vintage Americana. This air-cushioned sole is hard-wearing, with good abrasion and slip resistance. This is a Goodyear-welted product. The upper and sole are sewn together, not merely glued, like many footwear constructions. This, together with our Z welt-stitch and heat-sealing process, makes it unique to Dr. Martens.