Dr. Martens become more comfortable as they age. The Rugged Collection uses supple leathers, classic shapes and agricultural-inspired styles, given a distressed and worn-in look. Chelsea Boot Burnished Wyoming: leather with a subtle grain and oily surface The sole is stitched and cemented to the base of the upper and to the insole Dr. Martens air-cushion sole, oil and fat-resistant, offers good abrasion and slip resistance