A super cool and unique boot that served as a prototype for boot testing, this K2 boot has a nice all mountain build with tech inserts, perfect for a do it all ski boot. The boots stiff construction seems to be around a 120/130 flex index rating which will allow for hard skiing all over and in just about any terrain. If you are looking for a new boot and want a one of a kind pair of boots, this K2 will have you covered.