The Session helmet from Smith is made for charging hard with a suite of protective features. It features, MIPS, Zonal Koroyd and an integrated skeletal structure to keep your head safe. The Multidirectional Impact Protect System reduces the chances of brain injury from torsional forces in a crash, while Koroyd provides a lightweight solution to direct impact force reduction.
The Session is also incredibly comfortable, with an adjustable cradle for a snug fit and plenty of venting to keep you cool on tough climbs. Goggle users will like the Session for its 2-position visor which allows you to pull your goggles up out of the way without taking them off entirely.
Measure the circumference of your head around the widest part of your head, typically 1-2cm above your ears.