Durable and famously stiff to start, Smooth Leather can be polished to a dapper shine or artfully scuffed-up depending on your preference. Navy Blue Smooth Leather Goodyear Welted - the upper and sole are heat-sealed and sewn together, providing more comfort and durability for years to come. Wipe away dirt using a damp cloth. Apply Dr. Martens Wonder Balsam to the outside of your footwear to keep the leather supple, strong and smooth. Once dry, buff vigorously to desired shine using a clean Dr. Martens Shoe Brush. Repeat regularly to prolong the life of your footwear.