evo.com | Giro Helmets > The Giro Ratio MIPS Helmet balances impeccable safety features with a low-profile, clean style. MIPS technology complements traditional hardshell construction for direct and rotational impact protection, while the in-form fit keeps the Ratio firmly in place. Cap that off with a stacked thermostat vent control and Outdoor Tech audio compatibility and the Giro Ratio MIPS Helmet looks more and more like the perfect shred lid for winter riding. Stack Ventilation Stack Ventilation was developed based on research showing the majority of the warm air that can cause fogging exhausts from the center top vent of the goggle. Aligning the Stack Vent in the helmet with the center vent of your goggles helps to keep them clear and fog free while maintaining total helmet and goggle integration. MIPS(R) | Multi-Directional Impact Protection System MIPS is a step forward in helmet design and can provide more protection in certain impacts. There are three main components to a MIPS-equipped helmet: the Interior Foam Liner, the Low Friction Liner and an elastomeric attachment system between them. In an angled impact, the elastomeric attachment system stretches to allow the foam liner to rotate independently around your head. The goal of this technology is to further reduce rotational forces. CE EN1077B Seamless 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 goggles offers exceptional fit and dependable, worry-free function. In Form(TM) Fit System A low-profile fit and stability system that makes it easy to dial-in the fit and feel of your helmet in seconds - even with gloves on. An ergo-friendly dial at the base of the helmet provides up to 6 cm of fit adjustment, and the system also includes a separate vertical turning feature that adjusts the fore / aft tilt of the helmet on your head to enhance peripheral vision and optimize the fit of the helmet with goggles. | Giro Ratio MIPS Helmet 2023 - Medium in Green