K2 Skates - Velocity 4.0 (Bone/Purple/Grey) - Men's: No other fitness skate in history has risen to the level achieved by the Velocity 4.0. K2's engineers started from the ground up and sculpted a masterpiece of comfort and performance with the all-new Velocity 4.0. The Velocity's Enhanced Stability Cuff provides great support with unbelievable comfort, made possible through its enhances dual material construction. The inside of the skates are tailored with Coolmax fabric for better breathability and moisture movement and the use of strategically located flex zones. An ultra-lightweight Aluminum/Ti alloy frame complements the boot to deliver an enjoyable all-day ride for committed fitness skaters. Fit Logix 2. 3.0 Power Transfer. Lace/Buckle/Strap closure. 78mm/78a wheels. ABEC 5 bearings.