Head Kaliber 100 MV BOA Ski Boots - 2026Advanced skiers looking for a precise fit with reliable performance will find it with the Kaliber 100 MV. The 100mm last features a new shape which combines increased toe space with a closer wrap of the cuff around the lower leg. The Synapse S Linerthinner and with a more anatomical shapefurther enhances the fit with better foot retention, plus the addition of Graphene woven in for temperature regulation.