2020 Bontrager Rally MIPS helmet small - $45

Bontrager Rally MIPS helmet, black, size small. New in box. It's just a bit too small for my fat head. Here's what the manufacturer says about it:

The Rally MIPS mountain bike helmet raises the bar in comfort and protection. Equipped will all the best features including MIPS brain protection system, BOA® Fit System for superior comfort and security, and the Blendr mount system for light and camera integration. Plus extended coverage and ample vents will keep you riding all day on the toughest trails.

MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head

Craigslist ad:
https://boston.craigslist.org/gbs/spo/d/milton-bontrager-rally-mips-helmet-small/7318032903.html