Designed for the cold and slippery days of big game hunting, the new Fieldrunner grips to treestand grates while offering impressive footing in mud and snow with its new waffle style wide-tracking outsole. The protective Spandura exterior has forgiving 4-way stretch, while being resistant to briars and thorns. A warm 5mm neoprene interior lined with fleece ensures warm feet while standing still for long periods of time. Comfort Range: -20F/-30C to 50F/10C. Oversized angled topline. Spandura upper. Fleece lining. 5mm CR flex-foam. Etc sockliner. Optimal flex points. Upper rubber support cage. Aggressive waffle outsole.