Flak helmet
From Twilight Heroes Wiki
flak helmet
Plural: Unknown
Like my dad always used to say: "If it looks like a duck and flaks like a duck, it's probably insurance." Uh, anyway ... it may look a little dorky, but this helmet will provide your noggin with a little bit of damage insurance, assuming you are like most people who look up when someone yells "Duck!"
Helmet
Power: 15
Level Required: 2
Autosell value: 20
Usable
Can be welded
How Obtained
Unknown
Unknown
Using multiple: Unspecified
How Obtained
Buy at Lieutenant A.E.P. Bazooko's Military Surplus
When Used
You rap sharply twice on the top of the helmet and say, "Knock knock!" but nobody answers.