Altitude 2.0 Hi-Flow Helmet

Reinvented to ride even harder, the second generation of the bestselling 509 Altitude series unleashes a whole new animal. For those who run at redline, the new 509 Altitude 2.0 Hi-Flow Helmet maximizes airflow with open upper and rear vents plus a 40% larger chinbar intake. Everything else is what you’d expect from one of the world’s bestsellers, including a new hand lay-up fiberglass construction that makes this helmet lighter, stronger, and even more comfortable.

509 Helmet Features Key

Hand lay-up fiberglass composite construction
XS to 4X sizes available in three shells for optimal fit and minimal weight
Upper vents for optimal airflow
Go-Pro® mounting capability, improved design
Fidlock® chinstrap strap closure for easy in and out
Perfect fit between helmet eyeport and 509 goggles
Pro-Series Breathbox for complete protection, removable for optimal air flow

Specs
Weight: DOT/ECE 1200 grams