The Rossignol AllTrack Pro 130 Ski Boot delivers a precise and stiff fit for going big either in or out of the resort. With a 130 flex and new, external Sensor Grid technology to improve shell wrapping and torsional rigidity, this boot delivers power, precision, and efficient energy transmission without added weight. The OptiSensor liner features a softer ankle and instep and a stiffer heel for secure lockdown Thinsulate keeps you warm without losing fit efficiency. Reinforced vertical ribs in the upper cuff lock upper and lower shells together for unprecedented downhill performance when you're in ski mode when you flip to hike mode, a U shaped lower cuff allows tons of mobility for hiking the ridge. At this level, there are no strictly resort or backcountry only skiers there are go anywhere, ski anything fun hogs. Rossignol's AllTrack series of boots combines the response and performance of on piste ski boots with the versatility you need to access the backcountry. The Pro 130 is the stiffest, most performance oriented boot in the line the 'Pro' designation means it is built around a 100mm last for skiers with feet of medium width and volume who are looking for a more snug and performance oriented fit.