Giro Merit Spherical Helmet

Spherical Technology is a ball-and-socket design that allows the outer liner to rotate around the inner liner during an impact. Unlike traditional MIPS liners that sit against your head, this system separates the two layers of foam, which helps redirect impact forces away from your brain more effectively.

The Merit is designed with large Wind Tunnel vents and deep internal channeling that actively pulls air across your scalp. It is highly effective for trail riding, keeping you significantly cooler than standard mountain bike helmets during intense climbs.

Yes, the dial is oversized and textured, making it simple to tighten or loosen the fit even with full-finger mountain bike gloves on. The system is designed to be intuitive and secure, ensuring the helmet stays stable on rough terrain.

Measure the circumference of your head just above your eyebrows. The Small fits 51–55cm, Medium fits 55–59cm, Large fits 59–63cm, and X-Large fits 61–65cm. If you are between sizes, we recommend sizing up for a more comfortable fit.

Yes, the Ionic+ padding uses silver fibers to naturally inhibit the growth of odor-causing bacteria. It is very effective at keeping the helmet fresh over long, sweaty rides, though you should still wash the pads periodically.

The Merit is built for fast, flowy trail riding and demanding climbs, offering a balance of coverage and ventilation. While it provides excellent protection, it is an open-face helmet, so if your racing requires a chin bar, you would need a full-face model instead.