The K2 VO2 S 90 men's inline skates are ideal for training skaters looking for a high-performing model. They feature a responsive and vibration absorbing VO2 S frame and four 90 mm wheels with premium ILQ-9 Classic Plus bearings for a smooth, high-speed training experience. Adding to the comfort of the K2 SoftBoot is the integrated Vortech ventilation system, a 3-part system for keeping feet cool and dry on intense training sessions by channelling air through the base, footbed and upper. With the VO2 cuff providing support, those skates are the perfect balance of speed, stability and comfort.