Just recently posted to NECAonline.com is an announcement that in July 2015, a limited edition Master Chief replica helmet is to be released as a DOT approved protective motorcycle helmet.
From the award-winning Halo video games, this detailed replica of Master Chief’s headgear is also a DOT-approved modular motorcycle helmet! Master Chief Petty Officer John-117 is a central figure at the forefront of the war against the Covenant and rumored to be the lone survivor of the declassified SPARTAN-II project. This limited edition helmet has a convenient modular design with glove-friendly opening mechanism and full list of features.
I've always wanted a Master Chief helmet, especially ever since I got the Halo 2 Legendary Edition that came with the replica prop. It just wasn't the same. Now I can buy this and just need the rest of the suit to go along with it... and I don't even own a motorcycle.
Check out NECAonline.com for the full post.