For the consumer who prefers the performance of a wool liner and durable full grain leather upper, Sorel takes a few cues from its past and presents the Caribou Wool. Seam-sealed waterproof construction with full grain leather upper. Features a Sherpa Pile faux fur snow cuff for added warmth. Rustproof hardware. Knit wool snow cuff. Removable 9mm felt wool InnerBoot. 2.5mm bonded felt frost plug used underfoot to increase the thermal barrier between you and the cold ground. Handcrafted waterproof vulcanized rubber shell with Sorel AeroTrac non-loading outsole. Temperature Rating: -40 degrees F/-40 degrees C Imported. Measurements: Heel Height: 1 in Weight: 2 lbs 14 oz Circumference: 17 in Shaft: 10 in Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.