Giro's In Form Fit System allows you to adjust both the horizontal tightness of the helmet and the vertical fit of their youth and adult helmets. This easy to use dial turns to tighten or loosen the helmet for a precise fit. To make vertical adjustments on the fit of the helmet, simply remove the fit system from the inside back. The two pegs on this piece correspond with a row of holes on the inside back of the helmet, allowing for fine-tuning. The vertical and horizontal adjustments on Giro helmets help to eliminate gaps between the helmet and goggle, sealing out the wind and snow and helping fight goggle fogging through proper ventilation alignment.
Dial turns to tighten or loosen helmet
Remove fit system from the back of the helmet. These two pegs corresponde with ------------------------------------------> a row of holes on the inside of the back of helmet.