Gear Junkie: This Convertable Mountain Bike Helmet Sold Out in 2 Weeks

Sweet Protection launched the Arbitrator mountain bike helmet this spring in a limited run, and it promptly sold out.

Why? Because for $300, this helmet is so dialed that it functions as a certified full-face helmet and transitions to a well-ventilated trail riding helmet within seconds. I recently traveled to the brand’s Norway headquarters in Trysil to learn more about the brand and this revolutionary new helmet.