Smooth leather fashions a classic lace-up boot with a comfy air-cushioned sole and side zip for easy slip-on wear. Style Name:Dr. Martens Boot (Walker, Toddler & Little Kid). Style Number: 673342. Available in stores. Dr. Martens Boots, Lace Up Boots, Leather Fashion, Smooth Leather, Side Zip, Kids Shoes, Combat Boots, Leather Upper, Slip On