Double eyepatches

Double eyepatches are the result of having Patchy sew a left eyepatch and a eyepatch together. Left eyepatches are lootable items from Pirate implings, which can be caught after the Rocking Out quest. Right eyepatches can be obtained from killing low-level pirates, or bought at Trader Stan's Trading Post.

There's almost no mention of this item in the knowledge base, and it has no stat bonuses whatsoever. When speaking to an NPC, the appearance is that the character is wearing dark sunglasses, but on the equipment screen it looks like 2 different eyepatches wrapped around their head; the bands make an "X" pattern on the back of the head.

Trivia
The examine info, "It's dark, and I'm wearing two patches. Hit it!" is a reference to the movie "The Blues Brothers". In the movie, the main character Elwood says "It's a hundred and six miles to Chicago, we got a full tank of gas, half a pack of cigarettes. It's dark, and we're wearing sunglasses." Following this, the other main character, Elwood's brother Jake, says "Hit it!". The film was also referenced on another occasion by the cartoon "Fosters home for imaginary friends" when one of the main characters, Bloo, says "It's six blocks to Mac's house, a full bladder, half an idea of where I'm going, it's Tuesday and I'm wearing sunglasses", followed by "Hit it!" and jumps out a window.