The most important feature of the Helios is the Spherical technology, which allows the outer shell to rotate around the inner one during a fall. At the same time, the layering system of the two shells provides comprehensive protection and performance. The fit is comfortable and very secure, thanks to the adjustable Roc Loc 5 Air MIPS system, allowing for high stability and comfort. Additionally, the Artex MIPS offers extra protection against rotational forces during an angled impact. Whether on roads or gravel, the Helios Spherical is the perfect companion. Available sizes: M: Head circumference 55-59 cm S: Head circumference 51-55 cm Colors: black/matt, black/green