The Sorel Caribou Boot is a classic winter boot designed for extreme cold and wet conditions, combining seam-sealed waterproof construction with a removable insulated inner boot for reliable warmth and traction. Key attributes: Buff | Nubuck leather | Waterproof | Comfort rated to -40°F | AeroTrac non-loading outsole for traction | Removable 9 mm felt inner boot | Lace-up closure | Seam-sealed waterproof construction | Handcrafted vulcanized rubber shell | Sherpa / wool-style snow cuff | High-shaft winter silhouette | Dimensions & fit: Shaft height: 8.5–9 in (based on size 7) | Heel height: 1 1/6 in | Platform height: 5/7 in | Composition & care: Nubuck leather | Rubber | Felt (wool/acrylic blend) | Synthetic materials | Removable inner boot is washable; wipe upper and rubber shell clean with a damp cloth; air dry inner boot.