Built to protect from the cold, the men's Sorel Alpha Pac II boot is sure to keep you warm. This men's Sorel boot features seam-sealed waterproof polyutherane synthetic textile materials with reflective safety graphics. The Alpha Pac II Boot offers a built in gaiter with a barrel lock closure system and shatter-resistant YKK Shokonloc buckle closure for easy adjustment. The inner of the boot is insulated and provides a removable 9mm felt boot with Omni-Heat technology. The felt footbed provides cushion and support for the foot. The midsole is a 2.5mm bonded felt frost plug with molded EVA midsole for increased comfort and thermal protection. The outsole of the Sorel Alpha Pac II Boot is constructed with a polar lite shell that promotes flexibility and enhance traction on wet surfaces. The boot has a temperature rating of -60 degree Fahrenheit.