509 Altitude 2.0 Helmet

- Hand lay-up fiberglass composite construction for stronger, lighter weight, and better fit construction. DOT, FMVSS 218/ECE certified in USA.

- One piece eye port trim. XS to 4X sizes available in three shells for optimal fit and minimal weight.

- Upper vents with on/off shutter closure for airflow control. Fidlock chinstrap strap closure for easy in and out.

- Go-Pro mounting capability, improved design. Perfect fit between helmet eyeport and 509 goggles.

- Pro-Series Breathbox for complete protection, removeable for great air flow. Weight: DOT, FMVSS 218/ECE 1200 grams.


Reinvented to ride even harder, the second generation of the bestselling 509 Altitude series unleashes a whole new animal. Lighter, stronger, and even more comfortable thanks to a new hand lay-up fiberglass construction, the 509 Altitude 2.0 Helmet excels in any terrain or condition. Includes the Fidlock magnetic strap buckle for easy one-handed operation, plus customizable features like a removable Pro-Series Breathbox to get you through a full season of extremes.