An all-mountain boot from K2 that’s been updated from last year’s flagship model, the SpYne 130 has Y-shaped support called Powerfuse SpYne that helps support a rivet-free shell designed for a natural-feeling flex as well as power transmission. Other details include replaceable heel and toe pieces, grippy soles, a moldable Intuition liner and three last size options: 97mm, 100 mm and 102 mm.