Comfort rated at -60°C/-76°F, the Crossbow work boot stands up to extreme cold with an intensively engineered TERRASPHERE™ 4-layer lining system at its core. TERRASPHERE™ includes an aerospace nylon layer with CLEANFEET® odor-control treatment, premium moisture-wicking wool that is breathable and locks in heat, and a reflective, needle-pulled felt for extra durability. The Crossbow is built to keep you warm, comfortable, and protected on the toughest workdays.