Spice up your workouts with the K2 VO2 S 90 Inline Skates. These skates feature 90mm wheels that provide skaters with a blend of performance and agility that combines with a VO2 Cuff and VO2 S frame for a smooth, comfortable roll with moderate speed. The Vortech Ventilation system will move air below the feet to keep you cool and dry and the Speed lacing provides a secure, comfortable fit skaters will enjoy.