At this price point it's typically one size awkwardly fits all, or else it's a simple helmet lacking adequate airflow and an effective retention system. Fox Racing, however, has an advantage unlike the competition, the Flux is built with attention to these all important details. This means fewer molds and resources tied up in multiple, overlapping designs. Due to this, Fox Racing focuses its collective efforts on making the Flux one of the lightest, best breathing, and safest helmets in this bracket. In fact, it easily passes the stringent CPSC safety standard, complete with 20 large vents, and it comfortably balances a triple beam under the 400 gram mark. Those features contribute to the reason that many riders often have more than one Flux on deck. But there's more to it than that. Fox Racing was one of the first to forgo the industry's tradition of remarketing visor clad, skinny tire helmets to mountain bikers. Starting fresh, the original Flux successfully melded additional coverage with plenty of ventilation, leaving ultra aero, minimalist helmets for gran fondos. A Detox fit system is quick to adjust, and it comfortably wraps the head. The Flux is constructed from expanded polystyrene foam with an in mold shell, and Fox Racing provides several finishes to complete any kit.