Founded in Santa Cruz, California in 1985, Giro Sport Design relentlessly develops new ideas to enhance the ride. From the first light-weight, high-performance helmet for cycling and snow sports, to apparel that reimagines what sportswear can be, Giro maintains a strong focus on creating products to enhance the feeling of freedom and independence at the core of a rider's experience. As a leader in the design, fit and engineering of products that complement the body, Giro is the first choice for riders worldwide. Giro remains committed to serving enthusiasts with innovative performance products, driven by the knowledge that riding is the greatest part of a great life. As long as riders keep striving for better, Giro will keep making the gear that gets them there. Giro Ratio MIPS Ski Helmet - Snowboard Helmet for Men, Women & Youth 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 Mips includes Mips - which can offer more protection in certain impacts by redirecting impact energy. INTEGRATED MIPS HARD SHELL CONSTRUCTION SEAMLESS COMPATIBILITY STACK VENT TECHNOLOGY THERMOSTAT CONTROL VERTICAL TUNING UNISEX INTEGRATED MIPS All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards. The goal of Giro's Integrated Mips-equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the Mips slip plane with the helmet's adjustable fit system. Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts. HARD SHELL CONSTRUCTION Hard Shell Construction produces great helmet. A rugged outer shell is molded and then attached to the EPS foam liner. THERMOSTAT CONTROL Thermostat Control Adjustable Venting allows you to custom-tune airflow instantly with a simple, low profile control button on the outside of the helmet. No other system is faster or easier to adjust, and nothing is more effective at keeping you comfortable. STACK VENT TECHNOLOGY Our 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. Axis Axis Article Method Method Included Lenses 2 2 2 2 2 Quick Change System Yes Yes Yes Yes Yes Blok Semi Semi Roam Roam Included Lenses 2 2 2 2 2 Quick Change System No No No No No