Keep extreme conditions at bay with the Sorel Alpha Pac XT boot protecting you all day long. Waterproof PU-backed synthetic textile upper. Polar Lite shell for enhanced flexibility in extreme temperatures. Reflective safety graphics keep you visible in low lighting. Features a built in gaiter with barrel lock closure system for a secure fit. Shatter-resistant YKK Shokonloc buckle closure at collar. Removable 9mm recycled felt inner boot with Omni-Heat reflective lining provides superior protection against the cold. Cushioned 9 mm felt footbed provides all-day comfort. Molded EVA midsole offers enhanced comfort, a lightweight feel and thermal protection. 2.5 mm bonded felt frost plug offers a little extra warmth and protection in the midsole. Durable rubber outsole with multidirectional rubber lug pattern for excellent traction. Imported. Measurements: Heel Height: 1 1 2 in Weight: 2 lbs 10 oz Circumference: 18 in Shaft: 14 in Product measurements were taken using size 15, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.