Giro Coalition Spherical Full Face Mountain Bike Helmet

Engineered for serious riders who refuse to compromise, the Giro Coalition Spherical Helmet redefines lightweight full-face protection. At just 800 grams in M/L, this NTA-certified MTB helmet harnesses Spherical Technology powered by Mips alongside Progressive Layering - combining EPP and EPS foam to handle both high-speed and low-speed impacts with equal effectiveness. The standout innovation is the patent-pending Halo System: a sophisticated chinbar assembly using Pebax material and elastomeric bushings that absorb kinetic forces, delivering deflection performance nearly double standard certification requirements. Airflow is exceptional, thanks to strategically positioned front intake ports and rear exhaust vents channeled through the helmet's core. Finishing touches include DryCore sweat management, IONIC+ odor control, and adjustable cheek pads for a customized fit. Coalition Spherical proves that genuine protection doesn't require excess weight.

• HALO SYSTEM CHINBAR — The Halo System combines a chinbar with Pebax® (a material that is engineered to provide the perfect range of flex and rigidity) and elastomeric bushings that are integrated into the EPS to absorb and dissipate kinetic forces.
• 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.
• IONIC+® PADDING — Pure silver is the secret ingredient that gives IONIC+ ® the power to provide natural; permanent odor protection to keep your helmet feeling fresh.
• DIRECTIONAL SNAP SYSTEM — In case of emergency; cheek pads are easily removable without disturbing the riders head and neck position.
• OPTIMIZED FRONT INTAKE VENTS — Giro engineers designed precise placement and shape of intake vents to optimize cool air flowing over riders' heads.
• MAXIMIZED REAR EXHAUST VENTS — Our complex Wind Tunnel venting system allows hot air an easy escape route from the rear of the helmet.
• BREAKAWAY VISOR BOLTS — Tool-free breakaway visor bolts are engineered with an integrated Allen key receiver for easy removal and replacement in case of crash.
• FIDLOCK® MAGNETIC BUCKLE CLOSURE — The pinch-free one-handed Fidlock magnetic snap helmet buckle combines the advantages of two fastening concepts in a completely new way: Strong magnets make it easy to open and close; while a secure snap functionality ensures a continuous locking force.
• DRYCORE™ — The DryCore sweat management system utilizes an internal silicone bead to redirect moisture away from the rider's brow and eliminate the irritation of sweat dripping into the eyes.
• DEEP INTERNAL CHANNELING — Combined with the massive vents; internal channeling forces air to flow over the scalp; providing remarkable cooling power.

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.