Specialized S-Works Prevail 3 Helmet The Airflow will Prevail The new S-Works Prevail 3 Helmet by Specialized is the most ventilated helmet Specialized has ever made, setting a whole new standard for helmet design and airflow. The Prevail 3 has eliminated the foam cross bridges which block airflow and is instead built around a revolutionary Air Cage design-a series of aramid cables anchored to the carbon side panels. These cables help to reduce the helmet's bulk as well as to distribute impact forces much like a suspension bridge. The Prevail 3 also features Mips(R) Air Node technology, which reduces rotational forces during angular impacts and is the most ventilated Mips(R) system available. To top it all off, the Prevail 3 earned a 5-Star Virginia Tech(R) Helmet Rating(TM) for helmet safety. Light, ventilated and safe, what else could you ask for?Features5-Star Virginia Tech(R) Helmet Rating(TM) their highest rating for helmet safety Air Cage technology uses woven aramid cables, acting like a suspension bridge to increase airflow, reduce bulk and offer protection in a crash Mips(R) Air Node technology is a low friction layer to reduce rotational forces in a crash, while providing excellent airflow Occipital Base Adjustment for optimization for every head shape and to better accommodate eyewear Tri-Fix webbing with thinner straps for reduced wind noise and lighter weight Mindset Fit System is an ultralight dial system that is ANGi sensor ready (sold separately)SPECIFICATIONSClosure system Buckle Intended Use Road, Road Race Weight N/ASizing Size Small Medium Large Head Circumference (in)20 - 22"21 3/4 - 23 1/4"22 1/4" - 24 3/4"Head Circumference (cm)51 - 56cm55 - 59cm59 - 63cm | Specialized | S-Works Prevail 3 Cpsc Helmet Men's | Size Medium In Black