Here is a new and interesting collection of hats. The hats are made to look like the backs of the characters'
heads, so you too can have Sonic or Shadow's spikes, or Knuckles' quills! Sonic's demonstrates that they need a head in them or else they just flop flat.
These hats are rather odd. It's in a similar vein to the above ones, but features part of Sonic's or Knuckles' face. It is likely a takeoff on character hats you often see in Manga, where it has a kitty face or something for the top of their head. How well does it work for Sonic? Apparently pretty well, as they went ahead and made a Knuckles one too! You should be able to get either of these two hats in the SonicGear Store.
If there's Sonic & Knuckles, then there has to be Tails too. GE Entertainment's latest hat is a Tails based one. Is it cute or is it strange? The whole concept of these hats is kind of silly.