New from Atomic for this season, is the high performance and uber lightweight Hawx Ultra 100 Boot. This boot has a moderate 100 flex, a 98mm last and is intended for upper intermediate to expert skiers. What sets this boot apart from the competition is that 1. The Progressive Shell is insanely light for a boot of this caliber, in fact, you'll be surprised how light it actually is (about 25% lighter than other alpine boots to be exact). 2. It features Atomic's Memory Fit Technology, where both the liner AND the shell are heat moldable for a precise and comfortable fit. We recommend the Ultra 100 for a wide range of abilities from intermediate to expert skiers looking for boot with an even blend of performance and comfort.