75mm 3-Pin Boot sole with a medium boot flex. Anatomic Footbed - A special, anatomically designed footbed composed of three different materials assures a perfect fit and even distribution of force. Thinsulate Insulation - Compared to standard boot linings, the Thinsulate insulation system guarantees conditions for the feet that are twice as warm than other boots. The feet can breathe and regulate the natural physical feeling of the foot. Consequently they stay warm even in unusually wet weather conditions.