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The Ratio™ is a no nonsense helmet that boasts the features found on Giro’s premium helmets, yet at a more accessible price. Beneath the sleek silhouette, you’ll find the adjustability of an In Form fit system, Thermostat Control adjustable venting and compatibility with aftermarket audio systems by Outdoor Tech.
Hard Shell Construction
In Form Fit System, Vertical Tuning
Thermostat Control adjustable venting, Stack ventilation
Compatible with aftermarket Giro audio systems by Outdoor Tech, Seamless Compatibility with all Giro goggles