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Aeon Helmet

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Keep cool.

The Giro Aeon Helmet proves that lightweight and highly ventilating aren't synonymous with fragility. Despite its claimed weight of 218 grams — around 45% lighter than most of its competitors — and 24 capacious Wind Tunnel vents, the Aeon is CPSC certified, so there's no compromising safety for a light helmet and a cool head. With such an effective recipe for cool-headed safety, the Aeon remains largely unchanged for 2015.


The Aeon sees the return of Giro's Roc Loc 5 retention system. The Roc Loc 5's indexed Micro Dial lets you adjust the tension with a two-fingered twist, and the three position bracket allows 15mm of vertical adjustment in the retention basket. Even in an age of mass production, Giro's Roc Loc 5 Fit System makes the Aeon fit like a custom one-off. While other helmet manufacturers have similar adjustability options, none of them even come close to the weight savings that the Roc Loc system offers; it's almost 40% lighter than comparable systems.


The Aeon uses in-mold construction to fuse the foam liner to the abrasion and puncture resistant polycarbonate shell as other Giro helmets. However, Giro uses a low-density EPS liner for the Aeon that performs the same important task of absorbing impacts, yet it's 15% lighter than the foam they used previously. These weight savings are further complemented by the Thermoformed SL Roll Cage, which acts like a second shell to maintain the helmet's structural integrity and disperse impact. The added strength also means that Giro can add negative space to the Aeon without sacrificing safety, so it's more ventilated and lighter than its predecessor.


Occasionally, it's easy to imagine that helmet designers simply fill every possible space with vents and gaps designed to look aerodynamic or cooling or both. Not so with Giro, whose proprietary Wind Tunnel Ventilation System combines 24 vents in the shell with internal exhaust channels. Fresh, cool air from the front is strategically guided around the head to help evaporate the sweat before exiting through the rear exhaust openings.


Visor
no
Certifications
Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older
Fit Adjustment
Roc Loc 5
Ventilation
24 Wind Tunnel vents, internal channeling
Manufacturer Warranty
1 year
Claimed Weight
[medium] 222 g
Shell Material
polycarbonate, Thermoformed SL Roll Cage

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