Aero helmets traditionally force a compromise: accept reduced ventilation for aerodynamic gains, or prioritize cooling and give up speed. Giro engineered the Eclipse Spherical to reject that tradeoff. The helmet combines Transform Air aerodynamic shaping with 14 Wind Tunnel vents, delivering drag reduction across multiple wind angles while matching the cooling performance of aggressively vented road helmets. Cycling Weekly named it their top overall helmet for 2024, recognizing how effectively the Eclipse threads the needle between speed and thermal management.

Transform Air technology shapes the outer shell to actively streamline airflow, making the helmet appear longer to the wind and reducing the turbulence that creates drag. The design maintains its aerodynamic advantage whether you're in a relaxed riding position or tucked into a head-down sprint, adapting to the range of postures you actually use during a race or hard group ride. Giro's internal testing shows the Eclipse outpaces competing aero road helmets by meaningful margins over race distances, while the 14 vents and deep internal channeling keep air moving across your scalp even during sustained threshold efforts in warm conditions.

Inside the shell, Spherical Technology provides rotational impact protection through a ball-and-socket design powered by Mips. The outer EPS foam liner can rotate around the inner liner during a crash, helping redirect forces that might otherwise transfer to the brain. This approach eliminates direct contact with hard plastic or slip-planes against the skin, integrating the protection system into the helmet's structure rather than adding it as a separate layer. Progressive Layering stacks two different density EPS foams to address both high-speed and low-speed impacts, providing energy management across the range of forces a helmet might encounter.... Read More