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Designed with the contribution of professional mountain bike athletes, the Fox Speedframe Pro Defy helmet earned the highest rating (5 stars) awarded by the Virginia Tech Institute within the Bicycle Helmet Rating program. This high-performance open mountain bike helmet features a range of top characteristics, placing it among the market leaders, aiming to protect you as you tackle the most challenging trails. At the top of the list is the MIPS Air Node protection system, a low-friction insert for fully ventilated lightweight helmets, designed to reduce rotational forces in the event of impact, dissipating forces that would otherwise be transmitted to the brain. The dual-density Varizorb EPS further enhances impact protection by dissipating forces over a wider area. The BOA Fit System allows micro-adjustments for a perfect fit. The Ionic+ liner, removable and washable, is antimicrobial, prevents odor formation, and wicks sweat away from the head. The visor, adjustable with one hand, is compatible with both glasses and goggles; additionally, the helmet features dedicated supports for sunglasses. If you are looking for a high-performance trail helmet, congratulations: you have just found it!