The Giro Aeon was a former winner of our Editors' Choice Award and has lost its crown to the Giro Synthe. At 225g, the Aeon is the lightest helmet in our field of eight road cycling helmets. It's actually the lightest cycling helmet we've ever tested, so we awarded it a perfect score in our weight metric. The super low weight of the Aeon also makes it one of the most comfortable helmets in our test, only being outscored by the Giro Synthe and Lazer Z-1. The Aeon's 24 large vents combine with minimal yet adequate padding to make the Aeon an extremely airy helmet. The only area where this helmet suffered was in durability. It is less resistant to dents and dings than other helmets because its polycarbonate shell leaves much of the delicate polystyrene exposed.
The Aeon (pronounced Eon) replaced the Giro Prolight a few years back as Giro's uber light top shelf helmet. The Aeon is a major improvement over the last generation of Prolight. For starters, it uses Giro's RocLoc5 retention system, which is super lightweight yet provides enough security for much heavier helmets. The Prolight used a flimsy retention system which relied on an elastic band for tension. The Aeon also provides a bit more rear coverage than the Prolight.
Giro released new colorways for this helmet, such as the one pictured above, but assured us that all other aspects remain unchanged.
At $200, the Aeon is just slightly more expensive than the average of the eight helmets we tested, which ranged in price from $80 to $300. The Aeon is our absolute favorite helmet, but if you are looking for the best value, you should check out the Giro Savant, which shares many of the Aeon's qualities while retailing for just $90.
To see how the Aeon beat the rest of the test models, refer to our Best Road Bike Helmet Review.