Per the usual for Shoei, it uses an AIM (Advanced Integrated Matrix) shell construction built from fiberglass and organic fibers, paired with a multi-density EPS liner to manage impact energy
Or, just buy that gold one
In particular, the Hoodoo 18 is specifically designed for hiking with a mirrorless-size camera and does a good job of not looking too much like a camera bagalthough the lack of an external water-bottle pocket is a bummer
Their debut modular helmet, now open for pre-orders, offers a number of smart features, including a brake light, electronic safety monitoring, and a filtration device, which (along with a near totally sealed fit) can prevent over 80% of exhaust fumes, toxic gases, and allergens from being inhaled
I have included 4 slot shaped grease grooves in the outside diameter of the hollow hub to hold a little residual lubricant but have not tried this yet