Approximate boot shaft height: 12" Approximate mid-calf circumference: 12" Twin-faced grade A sheepskin with suede toe and heel guards Removable and replaceable comfort system insole is made of sheepskin, latex and foam . Molded rubber lug cup sole for strength and durability on rugged surfaces Available in whole sizes only. If between sizes, order a ½ size down. By UGG® Australia; Imported.