Just1 Racing J39 Reactor Motocross Helmet. With its new lining and two shell sizes, the J39 adapts perfectly to your head. High quality thermoplastic resin External Shell 2 Shell Sizes 3 EPS Sizes J. 1cm above the ears to get the most accurate measurement for the helmet.Working to understand the demands of the rider and crafting products along the way to meet such demands is of the upmost importance to Just1. The company was started with the goal of not just making helmets but making a better version of any of the helmets on the market. The company also already has several world titles to its name throughout various disciplines including both the 2016 MXGP and 2015 MX2 FIM Motocross World title with Tim Gajser and the 2013 MX3 title with Klemen Gercar. The item "J39 ATV Off Road Motocross MX Dirt Bike Helmet Flat Black Rockstar Energy S DOT" is in sale since Monday, December 2, 2019. This item is in the category "eBay Motors\Parts & Accessories\Apparel & Merchandise\Helmets & Headwear\Helmets". The seller is "bestbuy-auto" and is located in Chino,CA. This item can be shipped worldwide.