The F1 is the absolute precipice of touring boot technology, providing an amazingly lightweight build that is still aggressive enough to handle technical descents. The boots BOA Enclosure system makes for a precise and dialed in fit for over the foot on either the uphill or downhill while the fast buckle cuff system allows for a fast transition and dialed in fit on either side of a ski day. Featuring the reliable F1 ski/walk mode system and an absurd 62 degrees of range of motion while in walk mode making even the longest and most technical ascents possible. A comfortable 95 flex index rating makes this boot aggressive enough to handle the descents from the massive peaks you plan to bag.