Troy lee designs d3 carbon mips cadence greythis d3 carbon cadence helmet from troy lee designs is a multi award winning full face helmet and an updated version of their class leading d2 helmet with functional improvements and next level safety devices this helmet is also equipped with mips a patented brain protection system developed to reduce rotational violence to the brain from angled impactsquality is remarkabled3 is the only helmet to win redbull rampage gold wc dh series gold and ol