The Walking Sock Hat
The sock hat was headwear used by pirates, basically a knitted beanie but this uses an old walking sock stretched over your head.
The end of the sock was tied in a knot in the photo below and is quite a comfortable hat, I would almost be tempted to wear it in public.
Plus you can get 2 hats out of a pair of socks, or use that odd sock that has lost its significant other.
