With the softer flex of the Atomic Redster FIS 70 ski boot, young racers can use the same World Cup technology that took Marcel Hirscher to overall World Cup victory. This includes a Carbon Spine to channel power directly to the ski. Plus a super narrow 95mm last which provides an authentic race-room fit and exceptionally precise foot hold. On another note, Redster FIS 70 features Memory Fit – the next step in ski boot fitting. So you can create your own completely personalized shell, cuff and liner in a matter of minutes to get a true custom ski boot. The boot now comes with a Size Adjuster in the box that adds an extra half size to the boot when you need it.