509 Day is here with this limited-edition Sharkskin Camo refresh of the legendary 509 Altitude 2.0 Offroad Helmet—a leader for lightweight performance and breathable comfort. Track or trail, the Altitude’s bestselling package boosts airflow with a 40% larger chinbar intake and rear exhaust vents to keep you cool no matter what. Top of the line in every way, it includes the Fidlock® magnetic strap buckle for easy one-handed operation, plus GoPro® mounting capability. • 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