The Troy Lee Designs helmets A1 and A2 were celebrated for being the most comfortable, well-ventilated, and safest half-shell trail helmets on the market. After extensive and intensive development, the A3 emerges as the top-level helmet, setting new standards in safety, styling, and comfort. This is a helmet you'll want to wear 24/7. The A3 helmet features a three-part shell that extends in the rear for optimal protection during trail and enduro use. The Dual Density EPP + EPS inner shell provides exceptional protection against both high and low-speed impacts. The Multi-Directional Impact Protection System (MIPS®) reduces rotational forces in specific angled impact scenarios. Sixteen strategically placed ventilation openings ensure maximum airflow, aligning perfectly with the helmet's channeling. The integrated perspiration management system, along with the breathable, antimicrobial X-Static® helmet pads, ensures top-tier comfort. The patented Magnajust® visor with a 3-position adjustment system allows you to quickly lift the visor to place your goggles on the helmet when not in use. Additionally, the Fidlock® magnetic buckle makes it easy to open and close the helmet with one hand. Outer Shell: 100% Polypropylene. Inner Shell: 65% Expanded Polystyrene (EPS). Liner: 95% Polyester, 5% Elastane Exceeds Certifications: CPSC 1203, CE EN 1078, AS / NZS 2063