Giro Helios Spherical Helmet

The Giro Helios Spherical Helmet combines cutting-edge protective engineering with superior ventilation for serious road and gravel cyclists. Its innovative Spherical Technology features a ball-and-socket construction integrated with Mips® brain protection, enabling the outer shell to rotate independently during impact to effectively dissipate rotational forces. Progressive Layering of the helmet's dual liners delivers comprehensive crash protection across multiple impact scenarios. Engineered for performance, the helmet incorporates 15 strategically positioned Wind Tunnel vents paired with the proprietary Roc Loc 5 Air fit system to maximize airflow and cooling efficiency. The interior features antimicrobial XT2 padding that actively manages moisture, ensuring comfort during extended rides. A sophisticated choice for cyclists demanding advanced safety technology without compromising ventilation or fit.

• 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 with Progressive Layering™ use two different density EPS foam liners to address high- and low-speed impacts for more comprehensive energy management.
• MIPS® BRAIN PROTECTION SYSTEM — All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards. The goal of Giro's Mips-equipped helmets is to reduce rotational forces. Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts.
• WIND TUNNEL INTERNAL CHANNELING — Combined with the massive vents; internal channeling forces air to flow over the scalp; providing remarkable cooling power.
• ROC LOC® 5 AIR FIT SYSTEM — This revolutionary fit system adds a new dimension to helmet performance by enhancing cooling; as well as fit comfort and stability. Using a patented design that suspends the helmet just slightly off the top of the skull; Roc Loc® 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 feel adjustments mimic the Roc Loc 5; allowing you to easily custom tune fit tension and fore-aft tilt of the helmet in seconds using a single hand.
• IONIC+® PADDING — Pure silver is the secret ingredient that gives IONIC+® the power to provide natural; permanent odor protection to help keep your helmet feeling fresh.
• CE EN 1078

Bike Helmet Size Guide

How to measure your size – Wrap a measuring tape around your head, keeping the tape level from front to back. Note the measurement and reference the Size Guide. Note: Make sure the helmet fits with a little room when the fit system is loose, and sits low enough to protect your forehead without hindering your vision. Once you’ve got the right size, you can adjust the fit.