The little brother of the Forefront, the Smith Session MIPS still provides safety, aesthetics, and comfort—but in a tad bit heavier package. The Koroyd material has been reduced and placed in more strategic zones to keep the price low while still providing essential protection, and a MIPS liner enhances impact protection. The Session helmet features the VaporFit retention system and an X-Static liner for a comfortable, customizable fit, while 15 massive vents and internal channeling keep air flowing to cool your head. A great helmet for commuting, mountain biking, cyclocross, and everything in between, the Smith Session's value and versatility make it a great choice for any rider. Optimized Koroyd material and MIPS for impact protection VaporFit retention system for a secure custom fit AirEvac provides optimal ventilation to keep your head cool Equipped With AirEvac AirEvac ventilation system generates airflow to pull fog-causing, warm, moist air from the goggle chamber, via the vents on the top of the goggles. The air then circulates through the helmet's climate control system before it exits via the helmet's vents. Koroyd Koroyd utilizes an innovative open-cell construction of thermally-welded, co-polymer cylinders to protect your brain during a crash. Upon impact, the series of tubes crush uniformly to better convert, absorb, and decelerate kinetic energy, and as a result, reduce trauma. Aerocore Aerocore construction increases airflow to improve temperature regulation, increase impact-resistance, and prevent foggy goggles. Multi-directional Impact Protection System (MIPS) MIPS Brain Protection System is a helmet-integrated, low-friction layer designed to reduce rotational motion transferred to the brain from angled impacts to the head. Illustrations explaining BPS from MIPS Brain Protection System on Vimeo .