509 Altitude 2.0 Hi-Flow Helmet (ECE)

Engineered with larger chin bar intake and rear exhaust vents. All open vents removed shutter for increased flow, plugs removed, more breathable for mountain riders. Combined with an ultralight ECE layup this helmet is optimized for the most demanding off-trail riders.


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

Weight: DOT/ECE 1200 grams



*Helmets are not returnable due to the safety aspect required of the product.