The legendary A1 MIPS® helmet is the all-mountain MTB helmet from Troy Lee Designs, perfect for those seeking a lightweight helmet with excellent fit, outstanding safety, and high comfort. Whether you're hitting singletracks, dirt riding, or covering countless miles on your XC bike, the A1 MIPS® is the ideal choice. Equipped with a fiber-reinforced outer shell, the MIPS® system (reduces rotational forces on the head during angled impacts), and an EPS inner shell, it offers exceptional comprehensive protection during accidents. The Hi-Flow cooling system, with 16 air vents, ensures excellent ventilation, and the ultra-soft comfort head padding is removable and washable. With the Quick-Dry function, comfort is further enhanced. Adjustable flip buckle strap dividers allow for individual adaptation 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.