K2 Anthem Pro 21/22

The K2 Anthem Pro 21/22 is a performance-oriented alpine ski boot designed to give dedicated skiers a close, responsive connection to their skis. It’s built to help you make precise turns and feel in control on a variety of groomed and off-piste terrain.

Featuring a 98 mm last and low-volume fit, this boot wraps your foot snugly to minimize any slop between you and your skis, which translates to more direct power transfer. The 125 flex rating provides firm support and quick edge response when you tip into turns, while the 1650 g weight (size 24.5) keeps the boot agile enough for a full day on the mountain without dragging you down.

The last width—98 mm at the forefoot—defines how snug the boot feels around your foot, with a narrower last offering more precise control. The flex rating, here at 125, measures how much force it takes to flex the boot forward: a higher number means a stiffer shell suited to stronger skiers who demand quick, sharp turn initiation. At roughly 1650 g per boot, you get reduced leg fatigue without compromising the rigidity needed for aggressive skiing.