Monster Hoodie is a skin for the Chub Scout. It was released along with the Battle Damaged skin. It resembles Wil dressed in a hoodie, with the hood having "teeth". It came out in a series of new skin releases for each class after 1.3.4. It costs 30 Gas and does not have a level lock.
What can I say? This skin is just adorbs <3
~ Official Battle Bears Gold description