A lighter, cleaner shell design AND the addition of the BOA® Fit System lower closure makes the Atomic Hawx Prime 105 S BOA W GW Ski Boots something special this season. Building on the success of the most popular medium volume fit in evo's history, the Hawx Prime 105 BOA® has a fresh new look and improved fit over the forefoot while retaining the best heat molding technology in the industry.