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The 100% Altis is a lightweight trail mountain bike helmet designed for performance and protection. Features the SmartShock Rotational Protective System. High density EPS foam injection molded with polycarbonate shell. Adjustable ratcheting fit system. Multiple vents for airflow. Removable and washable liner.
100% Altec / Altis Helmet Size Chart
To find your size, measure the circumference of your head at the widest point above your ears and eyebrows. If between sizes, go up.
Size Head Circumference Extra Small/Small (XS/S)50 - 55 cm Small/Medium (S/M)55 - 59 cm Large/Extra Large (L/XL)59 - 63 cm
