Waterproof, full-grain leather upper. ; Removable 9mm ThermoPlus felt InnerBoot provides superb warmth, moisture transfer, comfort, and durability. ; Acrylic/wool blend snow cuff. ; 2.5mm bonded felt frost plug in the shell to provide an extra layer of insulation and warmth. The frost plug is a 2.5 mm piece of EVA that is in the heel and forefoot. ; Handcrafted, waterproof, vulcanized rubber shell. ; Rubber lug outsole. ; Sorel Rated: -40°F/-40°C. Measurements: ; Heel Height: 1 in ; Weight: 2 lbs 5 oz ; Shaft: 9 in ; Product measurements were taken using size 6, width B - Medium. Please note that measurements may vary by size.