The backbone of the Mach1 line up, the Mach1 100s unbeatable features and fit make it a perfect choice for intermediate to advanced skiers who are looking for a comfortable yet uncompromising fit. The C.A.S. liner is now joined by the anatomical, sculpted C.A.S. Shell and C.A.S. Bootboard to give you an impressive out of the box fit, with responsiveness and control to take your skiing to the next level. Quick instep for ease of entry and exit, adjustable canting and flex round out the long list of features that will make this boot a go to for a wide range of skiers this season.