Technology: 4 In Form™ Sizes, Compatible with all After Market Giro Audio Systems
Sizing: S (52-55.5cm), M (55.5 - 59cm), L (59-62.5cm), XL (62.5-65cm)
Ventilation: Stack Ventilation 14 Super Cool Vents with Weather-Strip Vent Shield
Construction: In-Mold Construction
Channeling the legendary Giro Nine born over a decade ago, the progressive Nine.10 packs tons of bang for the buck. Style lines borrowed from the Giro Seam combine withour innovative In Form fit system for the best fit ever made. Plus, we've replaced those pesky, easy to lose vent plugs with an ingenious Weather Strip vent shield.