Bell 3Qtr-Air MIPS Helmet Breathable on the way up, protective on the way down The Bell 3Qtr-Air MIPS takes everything that makes the Full-Air MIPS great and strips away the chin bar - leaving a helmet that breathes better on the climbs while still wrapping coverage around the upper neck and jaw for those moments when things get sketchy on the descent. Dual Flow Ventilation(TM) keeps the air moving, a Fidlock(R) magnetic buckle makes one-handed operation effortless, and the Fusion In-Mold Polycarbonate shell keeps weight in check without sacrificing structure. Add in a 2-position Flying Bridge visor, removable temple pads for extra airflow, an under-visor action camera mount, and Advanced Mips(R) Evolve rotational protection - and the 3Qtr-Air MIPS covers every angle of the ride. Features Advanced Mips(R) Evolve System is a leading slip-plane technology designed to help reduce rotational forces that can result from certain impacts Dual Flow Ventilation(TM) maximizes airflow through the helmet for superior cooling on hard efforts Dual Density EPS liner manages both high- and low-speed impacts for comprehensive energy absorption Fusion In-Mold Polycarbonate shell bonds the shell and EPS liner for a lightweight, durable construction2-position Flying Bridge Visor improves airflow and sun protection without a traditional center post, keeping the high-impact zone clear Fidlock(R) magnetic buckle for quick, secure, one-handed closure Removable temple pads for additional airflow customization Under-visor action camera/light mount for a perfect POV angle without zip ties or tape Sweat Guide(TM) channels moisture away from the face during hard efforts Removable, washable antimicrobial liner for easy cleaning and long-term freshness SPECIFICATIONSShell Construction Fusion In-Mold Polycarbonate MIPSAdvanced Mips(R) Evolve System Helmet Style3/4 Shell (Open Face with Extended Coverage)Safety Certifications US CPSC, CE EN 1078-2012, NTA 8776 (E-Bike), AS/NZ 2063Intended Use Trail, Enduro, All-Mountain Sizing Size Small Medium Large XLHead Circumference (in)20. 125 - 21. 5"21. 625 - 22. 375"22. 375 - 23. 5"23. 5 - 24. 625"Head Circumference (cm)51 - 55cm55 - 57cm57 - 60cm60 - 63cm | Bell | 3Qtr-Air Mips Helmet Men's | Size Medium In Matte Black