The Ratio™ Mips® helmet has the perfect ratio of everything you need to accompany you on the mountain, from its Thermostat Control Adjustable Venting to its Mips® technology to its laid-back style.
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. The Ratio is also available with Mips® - which can offer more protection in certain impacts by redirecting impact energy.
Hard Shell construction
EPS foam liner
Thermostat Control™ adjustable venting - allows custom-tuning of airflow instantly with a simple, low-profile control button on the outside of the helmet
Stack Vent™ Technology
In Form™ Fit System - easy to dial in a custom fit in seconds, even with gloves on. Ergo-friendly dial at the base of the helmet that provides up to 6cm of adjustment and enhanced stability