Cookie Carbon Fiber Atomic Open Face Skydiving Helmet Flat Lock Large.
Gently used open face with cutaway system. Flat lock mount on top. Removable plate on the left side. Plug was for a Sony CX100, remote on/off and LED indicator.
Large size. I wear a 7 1/8 hat and have a 22 1/2 head and it’s a little loose on me.