Approximate boot shaft height: 13" Approximate mid-calf circumference: 12" Heel height: 1.25" Twin-faced grade A sheepskin with suede toe and heel guards Removable and replaceable comfort system insole is made of sheepskin, latex and foam for "ultra" comfort with a Mylar sockliner for warmth. Molded rubber lug cup sole for strength and durability on rugged surfaces.