Perfect for deep snow. Waterproof upper, felt inner boot for warmth, and multi-directional lug sole for steady grip. Easy on and off. UPPER: Durable water and wind resistant PU backed synthetic textile upper. Built in gaiter with barrel lock closure system and fixed elastic instep strap. INSULATION: Synthetic insulation. Removable 6 mm washable recycled felt inner boot. MIDSOLE: 2.5 mm bonded felt frost plug. OUTSOLE: Injection molded waterproof thermal rubber shell with multi-directional lug outsole for enhanced traction. HEEL HEIGHT: 3/4 in. PLATFORM HEIGHT: 1/4 in. SHAFT HEIGHT: 9 1/2 in. SHAFT CIRCUMFERENCE: 13 3/4 in.