True to size: This footwear is true to size for a supportive comfortable fit. When you reach the end of a long day on the slopes or trail your feet are longing for something soft and warm to slip into. Enter our ThermoBall Traction Winter Booties which provide unbelievable comfort thanks to synthetic insulation that mimics cosy down. Not only that they also have ultra-grippy rubber outsoles that mean you'll stay firm-footed.