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 Carbon Fiber 3K 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 carbon composite construction that makes this helmet lighter, stronger, and even more comfortable.

• Hand lay-up carbon fiber composite construction
• XS to 4X sizes available in three shells for optimal fit and minimal weight
• Upper vents for airflow control
• 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
• 509 helmet bag included
• Weight:1070 grams
• Medium helmet weighs 2 lbs 9 oz

(1) Helmet

(1) Helmet bag

(1) Chin curtain

(1) Breath box

(3) Rubber vent plugs

Instructions