The Rossignol Radical 150 SI is a World Cup Caliber race boot for elite level racers. The 97mm last is designed to fit a narrow forefoot and narrow shaft of the leg, or to be shaped and sculpted to match the shape of your foot by a skilled bootfitter. Rossignol's Sensor Inside Shell improves the contact points between the big toe, little toe and heel bone to improve balance and control for faster times down the course. If you need a beastly stiff boot, with World Cup Precision the Rossignol Radical 150 SI is the boot for you. [+]