Ball-and-socket construction changes how a helmet responds to angled impacts. The Giro Helios Spherical builds this approach into a road and gravel helmet, using Spherical Technology powered by Mips to allow the outer EPS liner to rotate around the inner liner during a crash. This design helps redirect rotational forces away from the brain while eliminating direct contact with hard plastic or slip-planes against your skin. The result is rotational protection that's integrated into the helmet's structure rather than added as a separate component.

The Helios pairs this protection with Progressive Layering, which stacks two different density EPS foam liners to address both high-speed and low-speed impacts. Rather than optimizing for one crash scenario, the dual-density construction provides more comprehensive energy management across the range of forces a helmet might encounter. Giro develops and tests these helmets at their Dome laboratory in partnership with Mips, running thousands of validation tests before production approval to ensure the Spherical Technology performs as intended.

Ventilation comes from 15 Wind Tunnel vents working with internal channeling that routes airflow directly over the scalp. The Roc Loc 5 Air fit system enhances this cooling by suspending the helmet slightly off the top of your head, creating an additional pathway for air to pass through. You can dial in fit tension and fore-aft tilt with one hand while riding, making on-the-fly adjustments straightforward when conditions change or you settle into a longer effort. The system keeps the helmet stable without hot spots or pressure points across hours of saddle time.... Read More