Giro aerohead mips helmetgiros aeroheadtrade mips helmet acquires the same wind cheating profile as the innovative aerohead ultimate, but adds increased ventilation to keep triathletes and time trialists cool when the competition is hot.by using a polycarbonate shell, wind tunneltrade ventilation and internal channelling, the aeroheadtrade has proven to boost cooling power while remaining aerodynamic'. '.strtoupper('t')he aeroheadtrade mips helmet also features a wrap around eye shield that offers an impressive field of view with the convenience of a magnetic anchor attachment to allow easy storage of the lens in the ldquoflipped uprdquo position making the helmet perfect for fast swim to bike transitions.featuresconstruction in mould constructionpolycarbonate shellfit system roc locreg airventilation vented shield, over brow ventilation, 4 wind tunneltrade vents with internal channellingsuper fittrade engineeringeye shield made by zeissreg opticsmagnetic lens anchor attachmentmipsreg technologyweight 450gtechnologieslenses by zeissreg optics shield with magnetic attachment the wrap around eye shield offers an unblocked field of view with a huge aerodynamic benefit and the shield is made by zeissreg optics for unrivalled clarity'. '.strtoupper('a') magnetic anchor attachment keeps the shield secure, yet easy to remove, and it can be stored in the ldquoflipped uprdquo position.mipsreg all giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards'. '.strtoupper('t')he goal of giros mips equipped helmets is to reduce rotational forces'. '.strtoupper('w')hat is mips?mips is a brain protection systemrotational motion can cause brain injuriesthe low friction layer allows a sliding movement of 10ndash15 mm, in all directions, reducing rotational motion to the brain during impactmips adds protection roc locreg air fit system this revolutionary fit system adds a new dimension to helmet performance by enhancing cooling, as well as fit comfort and stability'. '.strtoupper('u')sing a patented design that suspends the helmet just slightly off the top of the skull, roc locreg air allows cool airflow to pass directly over your head, further enhancing the performance of vents and internal channelling that exhaust heat out of the helmet'. '.strtoupper('f')it and feel adjustments mimic the roc locreg 5, allowing you to easily custom tune fit tension and fore aft tilt of the helmet in seconds using a single hand.super fittrade engineering giro's proprietary super fittrade sizing system is based on ldquohuman scale factorsrdquo data and over 25 years of handcrafting helmets'. '.strtoupper('b')y creating helmet moulds in up to 4 adult sizes to match the human bodys form, their super fittrade sizes comfortably and securely fit riders and feel like they are custom made just for you.buy giro protection from chain reaction cycles, the world's largest online bike store.