Giro Source Mips Helmet

Built for serious trail riding, the Giro Source Mips delivers comprehensive protection without compromising on breathability. Its 17 strategically positioned vents and internal airflow channels work together to maintain optimal cooling during intense sessions. The integrated Mips brain protection system pairs seamlessly with the refined Roc Loc 5 fit system, ensuring a secure, customizable fit that stays locked in place. A motocross-inspired adjustable visor and reinforced Hardbody construction at the lower shell provide durability where impacts matter most. Whether you're pushing technical terrain or exploring new trails, this helmet combines aggressive protection with the ventilation and adjustability serious riders demand.

• INTEGRATED 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 Integrated Mips®-equipped helmets is to reduce rotational forces; while enhancing fit and comfort by combining the Mips slip plane with the helmet's adjustable fit system. 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. Learn more about Mips in the video above.
• WIND TUNNEL INTERNAL CHANNELING — Giro helmets are developed utilizing our proprietary Wind Tunnel ventilation system. This elaborate design combines active vents in the helmet's shell with exhaust channels inside the helmet that thrust fresh; cool air over and around the rider's head while forcing heat and stale air out. It's the most effective cooling system available; and a difference you can feel every time you ride.
• ROC LOC® 5 FIT SYSTEM — The industry benchmark in comfort; stability; adjustability and weight savings. In addition to enhancing the comfort and stability of helmets; Roc Loc® 5 allows you to easily custom-tune the fit tension and fore-aft tilt of a helmet in seconds; using a single hand. And it's lighter than comparable systems too; making it the ultimate in skull-hugging luxury.
• TOOL-FREE BOLT-ON VISOR — Easily adjustable without need for tools or extra fiddling; and offers plenty of vertical adjustment to stage goggles when you're not wearing them.
• IN-MOLD LOWER HARDBODY™ WRAP — The In-Mold process permanently fuses a light-yet-tough polycarbonate shell to the foam liner; eliminating adhesives and excess weight. Our Hardbody design extends that coverage to the inside of the helmet to enhance durability.
• ADJUSTABLE MOTO-STYLE SCREW-IN VISOR — This visor features an adjustment mechanism that lets you move the visor up and down in indexed steps. These steps include three riding positions plus a high position for goggle storage above your brow. The design allows you to easily adjust your visor with one hand while riding.

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.