Was lucky enough to find a WWII glow-in-the-dark Civil Defense helmet and matching goggles which are pretty distinctive by itself (will post up a pic of it later on). Been entertaining thoughts of applying d3o technology and inserting STF (shear thickening fluid) aka non-Newtonian materials into the shell of the helmet for added protection.
May just pick up a beanie from someone who licenses d3o's padding like Ignite Beanies and see how they pan out.
Talk about incognito safety gear.
As promised here's a picture of my glow-in-the-dork hell met... leather lined heavy metal skid lid. Not too much different from the ones posted above by the notoriousDUG