The Atomic Men's Hawx Ultra 110s Ski Boots have a flex perfect for medium build skiers. The Ultra series of the Hawx line is your narrow lasted version of the original Hawx boot. This Ultra series are Atomics lightest alpine boot, letting your feet stay completely agile while cruising the slopes. It uses Atomics Progressive Shell Technology, this shreds weight and material in the less essential zones while keeping the walls thick in those zones that take the most abuse. The Memorty fit liner found in the Ultra Series boots come pre-shaped with the ability to be thermomolded to your foot in just minutes creating a unique, comfortable ski boot.