They Spyne 110 is ready to be the most important and influential piece of gear in your collection. Designed completely by K2 from the ground up (they know a thing or two about skis), this 100mm wide 110 flex boot offers exceptional all mountain performance for aggressive skiers. The Heat Moldable LuxFit Intuition liner comes included in this boot which offers a precise fit for the ultimate ski control. K2 didn't leave anything off of this boot, this thing is decked out and we especially like the replaceable grippy rubber soles for safe walking no matter how icy it is. If you are an advanced to expert skier looking for a close fitting, comfortable boot that will offer the support needed for aggressive skiing, then the Spyne 110 will be an amazing choice.K2