Northwave Starlight 3S M 80141010 13 Cycling Shoes Properties: Northwave sports and cycling shoes for every sports enthusiast. Multi-layer, thermally welded upper closure construction with airflow system. The asymmetrical 3-strap design reduces pressure on the most sensitive areas of the foot while maintaining a secure fit. Reinforced NRG Air carbon fiber outsole with ventilation. Integrated heel system for maximum performance and reduced weight. Compatible with SPD blocks and clamping systems. Per Mance Advanced insert. The length of the insert is 24.5cm.