The Vostock Snow Boots are high performance winter boots that are ideal for cold climates. Snowproof and highly breathable, these boots also have a Thinsulate lining for extra warmth and a high-traction Vibram outsole for good grip. Thermal Tested -30 °C: Laboratory tested. Health & physical activity, exposure time & perspiration will affect performance & comfort. Vibram Sole: Recognised as the world leader in performance outsoles, highly durable as well as great traction and grip. High traction