The K2 VO2 Boa is a fitness skate designed with both comfort and performance in mind. It features the Vortech Ventilation System, which uses a light, breathable synthetic mesh construction to allow the liner to breath amazingly well, making it one of the most comfortable skates around. It has the most supportive fastening systems available with a steel wire Boa system working in tandem with a top buckle and lower Velcro strap. The Boa Closure System features a steel wire which runs up the front of the boot, and a circular clasp at the top which tightens the wire when turned. It is the fastest, easiest and most secure lacing system of any skate and the entire system is guaranteed not to break, or Boa will replace it for free. The alloy frame is fitted with 90 mm 83a X-Training wheels and ILQ-9 Classic Plus bearings, for maximum power and speed with minimum effort. This is one of the best skates that money can buy, as is it a fantastic combination of top quality parts and the latest in inline skate technology.