LIGHTWEIGHT FULL CARBON SHELL CONSTRUCTION AND INTEGRATED EJECT COMPATIBILITY In case of a crash this design lets first responders gently remove helmets from a riders head reducing the potential for secondary injuries XSTATIC AND XT2 PADDING Quickdrying materials woven with real silver fibers OVERBROW VENTILATION Overbrow Ventilation features intake ports on the brow of the helmet to usher in cool air and push it through the airchannel matrix for fullhead ventilation INTEGRATED BREAKAWAY CAMERA MOUNT Seamless camera mount requiring no zip ties or tape is engineered to break away upon impact to reduce the risk of injury SPECIFICATIONS Suitable for use on a bicycle only Sizes XSmall 5153 cm Small 5355 cm Medium 5557 cm Large 5759 cm XLarge 5961 cm and XXLarge 6163 cm Sizes Important always take a head measurement Head sizes and shapes can vary even within an age range Using a helmet that does not fit can be dangerous 10 Vents and 3 Brow ports