Engineered for those unforgiving climbs and blistering heat, ARO3 is built with optimized ventilation to help keep you cool, BOA's 360 degree fit system for the ultimate in comfort and fit, MIPS Brain Protection system and moisture wicking brow pad.FeaturesLightweight Polycarbonate shell360 degree fit band - X-Static brow padding - EPS protective foamTechnologiesAerodynamics and Thermal Regulation-Inspired by the shape of racecars and designed tomaximise aerodynamics without added drag. - Optics Intergration- Eyewear Dock:Specifically engineered to function without having to worry about eyewear interference. - The Oakley ARO3 features an integrated eyewear dock to securely stow shades and keep them handy for quick easy access. - BOA FS1-1 System-The 360 degree fit system is the result of a colaboration between Oakley and BOA, introducing for the first time in cycling helmets, a TX1 Braided textile retention system. - Designed and engineered for less interference with glasses and pressure againast the temple, the TX1 Lace lies flat against the athlete's head, allowing eyewear to sit naturally. - Anti-Microbial X-Static Browpad-Prevents stink by inhibbiting the growth of bacteria on fabric, eleminating human-based odor for the life of the brow pad. - MIPS Brain Protection System - A patented brain protection system to help provent heads against impact that can come from any direction. - Scientifically Proven - The MIPS technology is developed in Sweden since 1996 and scientifically proven to reduce rotational motion by absorbing and redirecting rotational energies and forces transferred to the brain from angled impacts to the head. - How it Works -In a helmet with MIPS Brain Protection System (BPS) the shell and the liner are separated by a Low Friction Layer. When a helmet with MIPS Brain Protection System is subjected to an angled impact, the low friction layer allows the helmet to slide relative to the head. The MIPS BPS is designed to add protection in helmets against the rotational motion. The rotational motion is a combination of rotational energy (angular velocity) and rotational forces (from angular acceleration) that both affects the brain and increases the risk for minor and severe brain injuries. MIPS BPS has been scientifically proven to reduce rotational motion when implemented in a helmet by absorbing and redirecting rotational energies and forces transferred to the brain. - Strain in the Brain -The illustration is based on data that was generated using a finite element computer model, based on measurements obtained from nine accelerometers in a Hybrid III crash test dummy head. The dummy head wearing a helmet was subjected to an angled impact using the MIPS test rig. - The model illustrates strain in the brain from a similar angled impact when the dummy head is wearing a helmet without MIPS and a helmet with MIPS.The Great Misconception -Standards and How You Really Fall -Accident statistics show that many injuries occur due to angled impact to the head. However, in standard helmet tests the helmetis dropped vertically onto a flat surface. The results are helpful for measuring precise vertical impacts, but far inferior for measuring the more realistic scenario of an angled impact. MIPS has been developed for reality and increases protection against angled impacts. - Size Guide ARO3 ARO3 ARO3 ARO5 ARO5 ARO5 ARO7 ARO7 Size Small Medium Large Small Medium Large Medium Large Head Circumference (52-56cm) (54-58cm) (56-60cm) (52-56cm) (54-58cm) (56-60cm) (54-58cm) (56-60cm) Helmet Weight CE (g) 251 269 271 264 288 305 / / Helmet Wright CPSC (g) 275 295 313 279 300 323 410 435 Helmet Weight AS/NZS (g) 275 295 313 279 300 323 410 481