These are the best boots to brave the elements with - fully waterproof and seam-sealed construction. With soft sherpa cuff and traction, you'll rest easy knowing they're in the boots that were made for whatever winter has in store. Details: INSULATION: Removable 9 mm washable recycled felt inner boot with Sherpa pile snow cuff. OUTSOLE: Handcrafted waterproof vulcanized rubber shell with Sorel aero-trac non-loading outsole. UPPER: Waterproof nylon upper. Seam-sealed waterproof construction. MIDSOLE: 2.5 mm bonded felt frost plug. HEEL HEIGHT: 3/4 in. PLATFORM HEIGHT: 1/2 in. BOOT SHAFT HEIGHT: 8 1/2 in. BOOT SHAFT CIRCUMFERENCE: N/A Measurements based on size 1. Uses: Heavy Snow Temperature rated to -40° F | -40° C