Engineered for those unforgiving climbs and blistering heat, the Oakley ARO3 Helmet is built with optimized ventilation to help keep you cool, BOA 360-degree fit system, MIPS Brain Protection, and a moisture-wicking X-Static brow pad. The helmet features an integrated eyewear dock to securely stow your shades and keep them handy for quick and easy access. The BOA FS1-1 retention system is a height adjustable 360-degree design that delivers an exact fit, perfect for you every time. With its soft textile feel and flexibility, the straps lay flat against your head, allowing for seamless eyewear integration. The MIPS Brain Protection System is a helmet integrated, low friction layer designed to reduce rotational motion transferred to the brain from angled impacts to the head. The X-Static Brow Pad harnesses the power of silver to inhibit the growth of bacteria on fabric, eliminating odor for the life of the product. Claimed weight: 295 grams. SM (52-56cm), MD (54-58cm), LG (56-60cm).