The 100% polyurethane Avengers Age of Ultron Hulk Armor 59Fifty Cap from New Era may have been slightly irradiated with gamma rays...that's the only thing I can come up with the slight glowy nature of this fantastic flatbilled hat! The Hulk may be played by Mark Ruffalo in Avengers 2: Age of Ultron, but you probably can't tell that by the Avengers Age of Ultron Hulk Armor 59Fifty Cap. That's what we like to call 'acting', folks.