Spryte’s Big D™ End Cap helps absorb vibration and boost barrel performance

while an adjustable strap provides a personalized fit

**Note: This version of the Tuuk Runner is not compatible with the Powerfly holder

Fit A is for skaters with low-to-flat arches and high pronation

the XF PRO

Head Formula 100 MV Men's Alpine Ski Boots - Black var_en_Colour_Grey-Yellow Spryte’s Big D™ End CapThe Head Formula 110 MV GW Alpine Ski Boots deliver precision and comfort with features like flex tuning, cuff alignment, and rear support tuning. An extended toe box, interchangeable toe and heel, and 4 micro adjustable alloy buckles ensure a custom fit for peak performance.