Three piece Cabrio Design improves the entry/exit process while providing a more secure and more comfortable fit Contour 4 Construction maps the anatomical fit of the boot in four key areas reducing pressure on the ankle heel fifth metatarsal and clavicular Built in Hike Ski Mode works in tandem with the to give you unlimited ankle articulation on the uphill and serious support and performance on the downhill For uncompromised performance uphill or down its hard to do better than the Dalbello Lupo AX HD Ski Boot Its built for power with a Lower Hinge Point and a Kinetic Response Tongue thats part of the Cabrio Design This means you get the support you need to really put the power down and a more comfortable fit too thanks to the Contour 4 Construction But its also a beast for uphill athletes as well The tech inserts allow it to work with pin style bindings and between the built in Hike Ski Mode and you get an unprecedented 40 of forward and 27 back movement for wide efficient strides and seriously comfortable feet even after a long approach