K2 s most popular model among advanced and expert level freeriders, the K2 Spyne 110 Ski Boots now come in three different lasts - this is the 100 mm version, best suited to skiers with average width and average volume feet. The perfect flex for those who spend more and more of their time away from hard groomers and more time exploring the steep and deep, the SpYne 110 features an Intuition® LuxFit liner, rivet-less PowerFuse SpYne construction, dual cuff alignment and a wide 45 mm power strap. Just a few runs will convince you that the Spyne 110 is the perfect blend of power, precision and all-day comfort.