Giro: TUNED RIGHTThe Ratio MIPS is a no-nonsense helmet that boasts many of 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. Ratio is available with MIPS — which can offer more protection in certain impacts by redirecting impact energy.FEATURESMIPS — Multi-Directional Impact Protection System can provide more protection in certain impacts. The main components of a MIPS-equipped helmet are 1. The Interior Foam Liner, 2. The Low-Friction Liner, and 3. an elastomeric attachment system. In an angled impact, the elastomeric attachment system stretches to allow the foam liner to rotate independently around your head.Hard Shell construction produces great helmets at a great value. A rugged outer shell is molded and then attached to the EPS foam liner.The In Form Fit System makes it easy to deail in a custom fit in seconds — even with gloves on. An ergo-friendly dial at the base of the helmet provides up to 6cm of adjustment and enhanced stability.Vertical Tuning — Accommodates different goggles and head shapes for a custom fit free of gaper gapThermostat Control adjustable venting allows you to custom-tune airflow instantly with a simple, low-profile control button on the outside of the helmetOur Stack Vent was developed based on research showing the majority of warm air that can cause fogging comes from the goggle's center top vent. Aligning the Stack Vent in the helmet with the center vent of the goggle helps keep it clear and fog-free.Compatible with aftermarket Giro audio systems by Outdoor TechSeamless Compatibility with all Giro goggles – For optimal performance of both helmets and goggles, Giro products are designed to work together, ensuring a seamless interface between helmet and goggle for an exceptional fit and dependable, worry-free functionCompliance: CE EN1077CONSTRUCTIONMIPS — Multi-Directional Impact Protection System can provide more protection in certain impacts. The main components of a MIPS-equipped helmet are 1. The Interior Foam Liner, 2. The Low-Friction Liner, and 3. an elastomeric attachment system. In an angled impact, the elastomeric attachment system stretches to allow the foam liner to rotate independently around your head.Hard Shell construction produces great helmets at a great value. A rugged outer shell is molded and then attached to the EPS foam liner.FIT SYSTEMThe In Form Fit System makes it easy to deail in a custom fit in seconds — even with gloves on. An ergo-friendly dial at the base of the helmet provides up to 6cm of adjustment and enhanced stability.Vertical Tuning — Accommodates different goggles and head shapes for a custom fit free of gaper gapVENTILATIONThermostat Control adjustable venting allows you to custom-tune airflow instantly with a simple, low-profile control button on the outside of the helmetGiro's Stack Vent was developed based on research showing the majority of warm air that can cause fogging comes from the goggle's center top vent. Aligning the Stack Vent in the helmet with the center vent of the goggle helps keep it clear and fog-free.