Cannondale Tract Helmet Bold design for dedicated riders The Cannondale Tract Helmet is a modern helmet, designed by riders for riders. This advanced helmet boasts a modern design for riders who love to push their limits on all types of terrain. The Tract is constructed using Smart Construction technology, an in-mold process that bonds the outer shell with the inner EPS foam, creating a stronger, lighter, sturdier helmet. The Tract also features MIPS Evolve technology to help reduce rotational forces during certain types of impacts, and features an extended design at the back of the head for more coverage where it's needed most. An adjustable, three-position visor provides adjustable coverage, while the Intelli Vent Cooling technology provides massive airflow to keep riders cool on the most technical terrain. Features Smart Construction uses an in-mold bonding process, bonding the outer polycarbonate shell with the inner EPS liner for a sturdier helmet Extended rear coverage for additional back-of-the-head coverage when riding on technical terrain Intelli Vent Cooling offers incredible cooling airflow at any speed MIPS Evolve equipped for additional protection from rotational forces during certain types of crashes Intelli Vent design features a full-width brow vent, six top vents, and five rear exhaust vents for dynamic cooling Ergo Fit Dial provides precise, 360-degree fit adjustment at the turn of a dial Extended rear coverage for more protection at the back of the head SPECIFICATIONSFit system Ergo Fit Dial Intended Use Trail Weight390 grams (size S/M)Size Small Medium Large Head Circumference (cm)51cm - 55cm55cm - 59cm59cm - 63cm | Cannondale | Tract Adult Helmet Men's | Size Medium In Fire Hydrant Red