Sacrifice nothing with the next-generation comfort and performance of the bestselling 509 Altitude 2.0 Offroad Carbon Fiber Pro Helmet. Elevated in every respect, it features the MIPS Brain Protection System for the highest levels of safety. Hand lay-up carbon fiber composite construction makes it lighter, stronger, and sleeker than anything before it. A precisely engineered fit and innovative venting keep you cool and comfortable while the Fidlock® magnetic strap buckle makes for easy one-handed operation.