Racing boot with biomechanical, removable inner shoe Elaborate ventilation system Aluminum inserts in heel area Comfortable entry thanks to zip all the way to the sole Ultra-lightweight sole Quick-release fastener on inner shoe Aerodynamic design: wind-tunnel-tested, super-smooth outer shell Exclusively for KTM by Alpinestars Material: 70% leather, 5% polyester, 15% polypropylene, 10% rubber