Woody Arctic Ice Rubber Boots provide extreme cold-weather protection and performance. Lightweight flex-foam booties feature a stretch nylon for increased flexibility to offer naturally insulating waterproof protection that moves easily. Fleece linings provide heat-trapping comfort, while the calf-hugging stretch-fit bindings seal in warmth and keep out the cold. The cushioned EVA midsoles with ergonomic, contoured footbeds absorb shock and cushion every step. The aggressive Vibram Arctic Grip outsole provides superior traction on dry ice. Thermochromatic lugs on the outsoles turn blue as the temperature plummets below freezing.