Sorel Caribou boots. The original Sorel boot features waterproof construction, seam-sealing and a removable ThermoPlus™ felt inner boot for warmth, comfort and protection in cold and wet winter weather. Waterproof nubuck leather upper. Seam sealed waterproof construction. Removable 9mm washable recycled felt inner boot with Sherpa Pile snow cuff. 2.5 mm bonded felt frost plug. Handcrafted waterproof vulcanized rubber shell with Sorel aero-trac non loading outsole. Shaft height: 8.5". Platform height: 0.7". Heel height: 1.16". Imported.