Sometimes simplicity is the key to success. The Madison 18 is a simple wide calf boot with the shaft having an 18 inch circumference in size 6 which increases in size with increased foot size. A soft calfskin upper sits atop a beautiful unit bottom outsole that adds to the comfort of the boot. The full length side zipper allows for easy on and off. In addition, a tricot lining is moisture absorbing and soft. Finally to complete the comfort story, the Madison 18 has a removable insole with a cushiony gel pack. Material: Calfskin.