The Head Challenger 130 Ski Boots are just the tool to let you take on any challenge the mountain has to offer, whether it be steeps, moguls, or short hike-to pow lines. This high-performing boot is built for expert skiers who need a level of stiffness to match their ability. With Head's unique Adaptive Fit technology, you can tune the width of the forefoot from 99 mm to 101 mm in seconds with just the turn of a screw, and the solid walk/ski switch gives you that extra mobility in the ankle needed for hiking or skinning.