+ 16 supercool vents to keep your head dry and cool.
+ Thermostat control. Lets you ajust airflow instantly with a low-profile button.
+ Weatherstrip vent plugs. Regulate your tempature: pop them in to seal out the chill or remove them to let the heat radiate out.
+ Removable earpads for extra warmth when you want it.
+ Goggle notch to keep goggles in place, even during a fall
+ High-impact ABS shell
+ EPS liner. The most highly impact absorbant and lightweight liner out there.
+ Super Fit™ designed to fit 98% of people perfectly.

AVAILABLE ACCESSORIES:
+ TuneUps Wireless for a hasslefree in-helmet audio connection.
+ TuneUps with BlueTooth LINK for in-helmet phone/audio.

SIZES	HEAD CIRCUMFERENCE (measure above the ears and right above your eyebrows)
Child	19.25 - 21.25 in 49 - 54 cm
Youth XS/S	20.5 - 21.75 in 52 - 55.5 cm
Youth M/L	22 - 23.75 in 55.5 - 59 cm
Adult XS	20.5 - 21 in 52 - 53.5 cm
Adult S	21 - 21.75 in 53.5 - 55.5 cm
Adult M	21.75 - 22.5 in 55.5 - 57 cm
Adult L	22.5 - 23 in 57 - 59 cm
Adult XL	23 - 23.75 in 59 - 60.5 cm
Adult XXL	23.75 - 24.5 in 60.5 - 62.5 cm