Gorgeous wide calf boot. Shaft circumference is 18 inches in size 6 and increases 3/16 inch with each shoe size to accommodate athletic calf. Full length side zipper for easy on and off. Soft tricot lining absorbs moisture and adds comfort. 1 1/4 inch heel and a rubber skid resistant outsole, soft calfskin upper and foam cushioned insole make this the perfect boot for winter.Material: Leather.