The Eclipse Spherical is both the fastest road helmet and the coolest aero road helmet Giro has ever created, bringing the latest advanced technologies together in a light, compact form that's ideal for road and gravel racing.

KEY FEATURES - 

TRANSFORM AIR - Transform Air Technology actively streamlines airflow to reduce drag across multiple wind angles. It optimizes aerodynamics by making the helmet appear longer to the wind, while still retaining an aero advantage in a head-down sprinting position.
14 WIND TUNNEL VENTS - Giro helmets are engineered with our proprietary Wind Tunnel venting system. This elaborate design combines active vents in the helmet's shell with exhaust channels inside the helmet that thrust cool, fresh air over and around the rider's head while forcing heat and stale air out.
SPHERICAL TECHNOLOGY - Spherical Technology's Ball-and-Socket design, powered by Mips®, helps redirect impact forces away from the brain by allowing the outer liner to rotate around the inner liner during a crash. It also eliminates contact with hard plastic or slip-planes against the skin.
PROGRESSIVE LAYERING™ - Giro helmets designed with Progressive Layering™ use dual-density EPS foam liners to address high- and low-speed impacts for more comprehensive energy management.
DEEP INTERNAL CHANNELING - The inner liner of the helmet is aggressively engineered to assist air flowing through the helmet, working in conjunction with our Wind Tunnel vents to provide an easy pathway for cool air to flow in and hot air to exhaust out.
ROC LOC® 5.5 AIR FIT SYSTEM - Using a patented design that suspends the helmet just slightly off the top of the skull, Roc Loc® 5.5 Air allows cool airflow to pass directly over your head, further enhancing the performance of vents and internal channeling that exhaust heat out of the helmet. Fit and adjustments mimic the Roc Loc 5, allowing you to easily custom fine-tune fit tension and fore-aft tilt in seconds using just one hand. Reflective decals provide added visibility.
IONIC+ ® PADDING - Pure silver is the ingredient that gives IONIC+® padding the power to provide permanent, natural odor protection to keep your helmet feeling fresh

SIZING (head circumference just above ears) - 

• S: 52-55.5cm
• M: 55.5-59cm
• L: 59-62.5cm
• XL: 62.5-65cm