The 100 Percent Aircraft Composite Full Face Helmet is 100 Percent's premier Downhill MTB helmet. Precision engineered with a fibreglass composite shell for an ultra-lightweight feel. Ventilation is enhanced with 25 different channels to manage airflow creating one of the most ventilated DH helmets on the market. 100 Percent Aircraft Composite Full Face Helmet Features Lightweight Design: Featuring a fibreglass composite shell. Active Cooling System: Maximizes airflow more than any other helmet with a staggering 25 ventilation ports. Comfort Liner: Washable, antibacterial liner, cheek pads and chin strap covers. Emergency release Cheek Pads: For quick, safe removal. Integrated Compartment: Accepts inflatable emergency release systems. Compatible: With most popular neck brace systems. Steel D-Ring buckle: Provides a secure fit while limiting weight. Perfect Fit: Engineered with 2 Shell Sizes and 3 EPS Sizes. Adjustable Visor: With machined lightweight aluminum screws. The AIRCRAFT complies with ASTM, CPSC, CE and AS/NZ Bicycle Standards.