The Rossignol AllTrack Pro 130 Ski Boot delivers precision fit and stiffness for going big in bounds, plus warmth and lightweight versatility when the backcountry beckons. With 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 3D 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 responseand performance of on piste ski boots with the versatility and light weight you need to access the backcountry. The Pro 130 is the stiffest, mostperformance oriented boot in the line the 'Pro' designation means it is builtaround a 100mm last for skiers with feet of medium width and volume who are looking for a snugger performance fit.