Racing boots with biomechanical removable inner shoeElaborate ventilation systemAluminum inserts in heel areaComfortable entry thanks to zip all the way to the soleQuick-release fastener on inner shoeUltra-lightweight soleAerodynamic design: wind-tunnel-tested super-smooth outer shellExclusively for KTM by Alpinestars70 leather / 15 polypropylene / 10 rubber / 5 polyester