SOREL Caribou Waterproof Nubuck and Rubber Women Boots SOREL Caribou Waterproof Nubuck and Rubber Women Boots SOREL's 'Caribou' boots were designed with cold, inclement weather in mind. Made from waterproof nubuck, this pair is fully lined with removable felt and set on vulcanized rubber platforms that are seam-sealed to ensure no snow or rain will leak in. The faux shearling cuffs not only add extra warmth, but ensure a close, cozy fit too. (description exceeds maximum possible length)