Serious cyclists who log significant mileage and are looking for an ultra-light, top-quality lid will find the Aeon to be a comfortable, fashionable helmet with great ventilation and quick-fit adjustment.
Well ventilated and easy to adjust. With 24 trademarked WindTunnel vents and channels that drive air from the front of the helmet over the top of the head and to the back of the helmet, the Aeon cools cyclists' heads to prevent overheating on a strenuous ride. Users list the superior ventilation and great fit as the primary reasons for purchasing the Aeon. Available in small, medium and large sizes, the helmets are equipped with Giro's Roc Loc 5 system which allows riders to change tightness and vertical position with one hand, even while riding. The thin, flexible straps are similar to the Giros Prolight helmet's straps, and users praise them for their easy adjustability. A few reviewers mention that the buckle slides when the helmet is taken off, so it must be readjusted with each use. However, users point out that the buckle does not slide when latched, meaning it's only an inconvenience, not a safety issue.
As with all of our top-rated helmets, Giro's Aeon is fully safety-tested. The helmet's expanded polystyrene (EPS) liner is fused with the outer shell to create what the company calls an "exoskeleton." Within the foam liner is a web of nylon dubbed a "Roll Cage," meant to further protect a rider's head in case of a crash. A few reviewers from Amazon.com cite crash experiences with the Aeon, in which the helmets were dented but their heads were fine.
Easily adjustable. Cyclists who favor the Aeon are generally bike enthusiasts who spend hours in the saddle each week; for this reason, weight is an important factor in choosing this helmet. The Aeon's medium size weighs 218 grams. In comparison, one of the company's top-ranked older models, Ionos, weighs 346 grams, according to the editors of CompetitiveCyclist.com. Owners say this weight savings is a bonus for preventing sore necks in road races or simply when riding uphill.
Users also praise the helmet's fit, especially for oval-shaped heads, and the flexibility and softness of the chinstrap, which doesn't chafe behind the ear. Moreover, the Roc Loc 5 fit system means riders can effectively adjust fit with just one hand. Reviewer James Huang from BikeRadar.com calls the fit "outstanding" and also notes that thanks to the padding "even riders with shaved heads shouldn't have much of an issue." Some year-round riders recommend trying the helmet with a beanie or other woolen cap before selecting a size to ensure it won't be too tight in the winter or too loose in the summer.
Machine-washable, anti-microbial padding. Reviewers appreciate the removable padding, which is machine-washable and anti-microbial. The padding is described as thin, but adequate. Spare pads are usually included in the purchase from most retailers, providing riders with the option to swap out sweaty pads on a multi-day biking excursion or to use if the first set of pads becomes too thin from prolonged use.
Review Credibility: Excellent In this review, CompetitiveCyclist.com editors compare the Giro Aeon to five other recently released bike helmets, including the Lazer Helium, the Catlike Whisper Plus, the Louis Garneau Diamond and Giro's Ionos and Prolight. Using considerations of "helmet fit, comfort and vanity" reviewers choose Aeon as their top pick. "It looks fabulous, it's featherlight and it vents like a champ," reviewers write.
Review: Helmets: An Exploration, Editors of CompetitiveCyclist.com, Not dated
Review Credibility: Excellent Paul McKenzie compares the Aeon with his teammates' previous helmet, the Giro Atmos, finding the Aeon to be lighter, better ventilated and a better fit on his oval-shaped head. Teammates comment that the Aeon's straps are more comfortable. However, McKenzie notes when he takes the helmet off, the strap buckle slips so it often requires readjustment the next time he puts it on.
Review: Giro Aeon Helmet Review, Paul McKenzie, May 3, 2012
Review Credibility: Excellent James Huang gives the Giro Aeon 4 out of 5 stars in his review, saying that while the Aeon fits well, looks good and has adequate ventilation, it may not vent as well as the older Giro Ionos helmet. He writes the padding and straps are comfortable but is concerned the same dual-density foam that makes for a nice fit may also make the interior of the helmet less durable to wear and tear.
Review: Giro Aeon Helmet Review, James Huang, Aug. 10, 2011
Review Credibility: Very Good The Amazon community has given 51 five-star reviews to the Aeon helmet, out of nearly 60 reviews. Users most like the fit, comfort and the removable interior padding for washing. Several contributors say the only point they dislike about the helmet is the price. Others, while still giving five-star reviews, say they wish the chinstrap didn't loosen so much when removing the helmet, but admit this is better than previous Giro models that had thicker, more uncomfortable straps.
Review: Giro Aeon Road Bike Helmet, Contributors to Amazon.com, As of March 2013
Review Credibility: Good In this short review CompetitiveCyclist.com editors compare the Aeon with two other Giros products: the Prolight and the Ionos. They say, "The Aeon marries the breathtaking lightness of the Prolight and the fabulous ventilation and adjustability of the Ionos."
Review: Giro Aeon Helmet, Editors of CompetitiveCyclist.com, Not dated