The Head S12 Heatfit III is an all-mountain ski boot for advanced/expert skiers with a flex rating of 83/93 and varying shell last. It has a removable inner shell chassis that wrap forefoot and instep and bolt to sole. Two variants turn width from 103mm without to 100mm with frame inserted. The flex is adjustable via screws in the spine. Further features are: adjustable/removal front spoiler, dual cant adjustable rear spoiler, new race double power flip-out buckles, liner with numerous reinforcements, asymmetrical ankle frame, heel stay insertion pockets, and stretch neoprene toe box. This model was produced by Head for the 2006/2007 season and is made in Italy.