Maxpedition Arid Biohazard Skull Patch - Dangerously Detailed. The Zombie Apocalypse is on its way, and they can't say you didn't warn them. The universally recognized Biohazard warning symbol meets an animated skull in this strikingly detailed morale patch in light and dark green. 3-D contours bring out the skull's sunken eyes, and the glow in the dark design causes them come alive when the lights go out. Measures 2" x 2".