Salomon QST Pro 120 is the all-mountain / freeski ski boot that suits good to advanced level skiers. The 120 flex is firm but not too stiff. The Salomon QST Pro 120 would be an unreal ski boot for local and international resort and off-piste adventures. They are very light and have an impressive range of flex in the hike mode. The hike mode is well designed and has no impact on the downhill performance.