The X-IUM WCS Skate BOA MV carries carbon-injected elements through the chassis, cuff, and heel counter, the same construction philosophy behind Rossignol's race-proven X-ium line, built into a medium-volume fit for skiers who want more room than a race last offers. An Expert Skate sole adds torsional rigidity through each push, so power transfer stays sharp even with the roomier fit. A heat-moldable liner and PVC shell with racing textile round out a boot built to hold its shape and keep moisture out over a full season of training. What Our Gearhead(R) Experts Are Saying:"I can spin the BOA dial mid-stride without breaking my rhythm, even with gloves on, and dial out a hot spot before it turns into a blister. The medium-volume fit hasn't cost me anything on push-off. I still get the same snap through the sole I had in a narrower boot."