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The Ratio™ MIPS® is a no-nonsense helmet that boasts many of the features found on Giro’s premium helmets offered at a more accessible price. Beneath the sleek silhouette, you’ll see how easy it is to adjust the fit via the In Form™ Fit System, while Thermostat Control™ venting allows you to control airflow. The Ratio also comes compatible with aftermarket audio systems by Outdoor Tech, so you can listen to your favorite beats as you bomb down the mountain. Last but not least, the Giro Ratio is available with MIPS—which offers more protection in certain impacts by redirecting impact energy.



  • MIPS® – Multi-Directional Impact Protection System
  • Hard-Shell Construction


  • In Form™ Fit System
  • Vertical Tuning


  • Thermostat Control™ adjustable venting
  • Stack Vent
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