Product details:

Destroy all forms of dirt with the next-generation comfort and performance of the bestselling 509 Altitude 2.0 Offroad Carbon Fiber Helmet. Hand lay-up carbon fiber composite construction makes it lighter, stronger, and sleeker than anything before it. A larger chinbar intake plus upper exhaust vents keep you cool no matter how heated the session gets. Top of the line in every way, it includes the Fidlock magnetic strap buckle for easy one-handed operation, plus GoPro mounting capability. DOT approved. Meets the FMVSS 218 Standard.Hand lay-up carbon fiber 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
509 helmet bag included