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° F/-40° 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 single item- not the pair.