The Helio Helmet's Roc Loc 5 Air Fit System enhances a helmet's ventilation and cooling power, as well as the fit, comfort and stability while you ride. You can custom tune both the fit tension and the fore-aft tilt of the helmet in seconds using a single hand, and you can tune the contact points at the rear of the head individually, for a truly custom fit. This fit system is only compatible with the Giro Helios Spherical.
Helios/Eclipse Fit System
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The Helio Helmet's Roc Loc 5 Air Fit System enhances a helmet's ventilation and cooling power, as well as the fit, comfort and stability while you ride. You can custom tune both the fit tension and the fore-aft tilt of the helmet in seconds using a single hand, and you can tune the contact points at the rear of the head individually, for a truly custom fit. This fit system is only compatible with the Giro Helios Spherical.