With a 99mm last and 120 flex, these boots are designed for strong skiers that seek performance and comfort. CAS construction makes this boot moldable and totally customizable to create the perfect fit to give you ideal performance on the descent. Hike/ski mode on the back spine and GripWalk soles make walking easy and more comfortable. Polypropylene cuff with co-injected carbon back spine gives the boot more stability and power transmission capabilities. If you’re looking for peak performance on both the hike up and descent, the Cochise Pro DYN is the perfect backcountry boot for you.