Arcteryx Procline Carbon Lite (2017)

The first hybrid ski alpinism boot of its kind, the Procline Boot
combines all features of a classic alpine climbing boot with
those of a lightweight ski mountaineering boot. It creates a
new benchmark of agility and lightness for technical ascents in
combination with superior support and power for big mountain
descents.

Featuring a revolutionary two-piece carbon fiber upper cuff
system that is able to rotate both vertically (75º) and laterally
(23ºmedial / 12º lateral), the Procline closes the performance
gap between a traditional alpine climbing boot and a plastic ski
touring boot and enables ski alpinists to only use one pair of
boots instead of two.