12 Eyelet Boot. Double brass buckle collar strap. Dark brown Burnished Wyoming leather. These boots are heat-sealed then stitched. This is a Goodyear-welted product. The upper and sole are heat-sealed and sewn together, not merely glued like many footwear constructions. The original Dr. Martens air-cushioned sole, providing underfoot comfort and durability since 1960. It is oil- and fat-resistant, tough and offers good abrasion and slip resistance.