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With unparalleled ventilation and innovative, aerodynamic style, the technically advanced Ionos solidifies Giro's position as industry leader of high-tech cycling helmets. Twenty-one massive vents offer 15% more ventilation than comparable helmets. Composite reinforced sub frame increases helmet strength and integrity during impact. Comfortable X-Static antimicrobial padding is woven with silver fibers to inhibit the growth of odor-causing bacteria and fungi. Dependable Roc-loc 4 retention system dials-in a custom fit. A winter liner is included for colder conditions. CPSC certified. Matte light blue/white, matte black/red, matte black/gold, matte black/white, navy/light blue, crystal blue/white, black/carbon, yellow/white, white/silver, red/white, blue/black, blue/white or Livestrong. S (51-55cm), M (55cm-59cm) or L (59-63cm).

Item Code: GIRYASTZ