The Salomon X Lab is a fantastic race boot for those skiers looking to shave seconds off of their last time trial. This is a stiff, performance oriented boot that requires an aggressive skier in search of a precise fitting boot. The “My Custom Fit World Cup” liner is heat moldable and provides excellent transmission between your foot, the boot and the ski. We recommend this boot to Racers and aggressive skiers looking for the tightest fitting boot they can find.