The legendary A1 Helmet is the MTB All-Mountain helmet by Troy Lee Designs for those seeking a lightweight helmet with excellent fit, outstanding safety, and high comfort. Whether you're on singletracks, dirt riding, or covering countless miles on an XC bike – the A1 is at home everywhere. Equipped with a reinforced outer shell, an EPS inner shell, and breakaway screws (reduces the risk of snagging during an accident), it offers excellent comprehensive protection. The Hi-Flow cooling system with 16 air vents ensures excellent ventilation; the ultra-soft comfort head pad is removable and washable. Thanks to the Quick-Dry function, wearing comfort is further enhanced. Adjustable flip-buckle strap dividers allow for individual adjustment to different head shapes. Outer shell: 100% Polycarbonate. Inner shell: 100% Expanded Polystyrene (EPS). Liner: 100% Polyester. Exceeds certifications: CPSC 1203, CE EN 1078, AS / NZS 2063.