The Aircraft is precision engineered with a fiberglass composite shell providing an ultra-lightweight design. Enhance venting channels manage airflow to create one of the most ventilated DH helmets on the market.Lightweight Design: Featuring a fiberglass composite shellActive Cooling System: Maximizes airflow more than any other helmet with a staggering 25 ventilation portsComfort Liner: Washable, antibacterial liner, cheek pads and chin strap coversIntegrated Compartment: Accepts inflatable emergency release systemsCompatible with most popular neck brace systemsSteel D-ring buckle provides a secure fit while limiting weightAdjustable visor with machined lightweight aluminum screws