Want the stiff, powerful feel of a full-fledged race boot, but don"t necessarily want to shell out the cash" Take a closer look at the Rossignol X-IUM Skate Boot. Designed and built for expert skiers that demand a powerful feel from their boots, the X-IUM sports the same Xcelerator sole that can be found on Rossignol"s World Cup skate boot for race-worthy performance. In terms of support, the X-IUM houses a 100% carbon cuff for better fore/aft stability while keeping the total weight of the boot at a minimum. A plastic heel counter offers Active Control heel support, which works with the locking Speedlace system and the Lock Down foot wrap to deliver a secure and responsive fit. A precise fit is the single most important factor in ensuring comfortable feet during those long training days out on the Nordic track, so Rossignol integrated a thermo-adjustable liner, so you get a fit that conforms to your own individual foot shape. Like all Rossignol boots, the X-IUM Skate Boot is NNN compatible.