Troy lee designs a1 mips helmet classic bluewhitethis a1 classic helmet from troy lee designs is a lightweight aesthetically pleasing all mountain helmet that offers the top quality fit protection and style you require optimum protection stabilitythe reinforced polycarbonate shell construction is in moulded with the eps liner that extends down the sides and back of the head for optimum protection and stability this helmet is also equipped with mips a patented brain protection system de