100% ALTIS GRAVEL Helmet CPSC/CEGravel with a sprinkle of MTBThe 100% Altis Gravel is a snazzy new helmet built for gravel and adventure riding but with key features taken from mountain biking helmet design. It features a Smartshock Rotational Protective system designed to deliver mountain biking level protection to gravel riders. Extended coverage out back is also inspired by mountain bike helmets and offers additional protection in case you end up rubber side up. 14 ventilation ports keep you cool as you power up fire roads and descend down trails loaded up with bikepacking gear. Anti-Microbial pads keep the stink at bay, wick away moisture, and are easily washable. All in all, the 100% Altis Gravel is a terrific choice for gravel riders in search of excellent protection and a sleek design but without an eye-watering price tag. Features Smartshock Rotational Protective system brings mountain biking safety tech to gravel Extended coverage for additional protection14 ventilation ports for plenty of airflow Anti-Microbial pads wick away moisture and are washable Adjustable ratcheting system makes dialing in the fit easy SPECIFICATIONSCore Material-Closure system Nexus buckle Safety Certifications-Intended Use Gravel, Cyclocross, Adventure Weight-Sizing Helmet Size Extra Small/Small Small/Medium Large/Extra Large Head Circumference (cm)50 - 55cm55 - 59cm59 - 63cm How to Measure Measure around the fullest part of your head, keeping the measuring tape horizontal. | 100% | Altis Gravel Helmet Cpsc/ce Men's | Size Extra Small/small In Grey | Rubber