Bandana (Fallout 3)

The Bandana is a white rag which is rolled and tied around the forehead.

If you get it early in the game, you can wear it with a pair of sunglasses. Not only does it look kinda cool, you can get +1 Perception with it, which helps your radar locate any enemies nearby. It is very useful early, because the bandana/sunny combo gives damage resistance close to other head gear.

By the way, the Bandana will also never deteriorate. It remains at 100% condition throughout the entire game no matter how long you wear it. Combine the Bandana with the Lucky Shades and you'll be the coolest cat in town. (Though it looks cooler with Red's Bandana.)

The white bandana can be looted from Ryan Brigg in the Jury Street Metro Station, the occasional Megaton Resident, as well as from Robert of The Family.