The Green Beenie Hat is a cosmetic item for a player's head which also provides low protection from damage. It is available in many skins, which can be obtained via the Steam market system or trading.
A wooly hat. People say you lose 90% of your body heat through your head. If that was true this would be a life saver. But it isn't.This is a skin for the Beenie Hat item. You will be able to apply this skin when you craft the item in game.