Based on one of our best-selling women's collections, the Sorella Collection has added depth to Dr. Martens' classic air-cushioned sole and subtle upper detailing, creating an everyday shoe with attitude. 8 Eyelet Plain Toe Boot. Black Greenland, a waxy leather with an attractive two-tone color surface. Padded collar. Heel loop. Goodyear-welted, the upper and sole are heat-sealed and sewn together.