The VO2 Max 100 Boa is the holy grail of X-Training skates, bringing every bell and whistle K2 offers. It’s built with the revolutionary, moisture-wicking Vortech Ventilation System, which adds to the comfort of the K2 Softboot function. A Boa Closure System creates the most high performance fit with no pressure points, and 100mm wheels, ILQ-9 Classic Plus bearings, and Vortech cuffs and frames allow for stability and support at the highest of speeds.