Pork Pie Hat

The Pork Pie Hat (also labeled as The "Burg") is a Cosmetic item.

Location
Go to Lost Path and follow it all the way back. On the left, you'll see an enclosed clearing far below with a trailer and a picnic table. Drop down into the clearing; the hat is inside the trailer. You can get out of the clearing by climbing the vines next to the chain-link fence.