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Giro Aeon Helmet

The Aeon is the lightest and most vented product in the Giro range of high performance helmets. Tipping the scales at a scant 218g (size medium), this lightweight wonder checks all the boxes with optimal protection, low-profile shape, oversized frontal and exhaust venting and Giro's perfected fit. Thin webbing straps with a clever adjustment and buckle combined with Giro's Roc Loc 5 occipital support rounds out this winning product.

How so light? Giro sheds weight with their proprietary Thermoformed SL roll cage. This one-piece internal reinforcement structure provides excellent impact resistance in a 50 percent lighter structure than the multi-piece fiber composite structure of the previous Giro designs. The roll cage is constructed from the same polycarbonate material as the Aeon's outer shell to provide double-protection. This solid design has led to the Aeon being both CPSC and CEN certified.

The Aeon is beyond category for airflow and cooling. It's hyper-vented with 24 internal vented channels with angled exhaust ports. This combo provides not only airflow, but expulsion of heat to help keep you cool and dry in warmer conditions.

The Aeon features the Roc Loc 5 retention system for easier fit, adjustability, better security and lighter weight. This clever design is the latest iteration and features a small, ratcheting micro-adjustable dial that can be turned with two fingers for a super-easy on the fly adjustment. The Roc Loc 5 also has a low-profile vertical fit tab that allows for up to 15mm of up-and-down adjustment.


  • Thermoformed SL internal roll cage
  • Poly carbonate exterior shell cage
  • Hyper-vented with 24 Wind Tunnel vents
  • Internal vent channeling with exhaust ports
  • Perfected fit with easy fit buckles and straps
  • Reliable Roc Loc 5 occipital support system
  • Antimicrobial, silver-fiber X-static helmet pads
  • CEN and CPSC certified
  • 218 grams (medium size)


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