Zombie Identification Chart Shirt cotton In case of zombie apocalypse, the most important thing is to know what you're working with. Identify your tools and figure out what type of undead you're up against. You might be prepared to tear a zombie in half with a machine gun. Effective against a 28 Days Later zombie. Not so effective for a Romero zombie. Which conveniently brings us to the list printed on this T-Shirt. Wear this shirt, and know what you'll be up against... Ice Grey Colored T-Shirt 100% cotton t-shirt Crew Neck Style Short Sleeve T-Shirt Length of T-Shirt measurement depends on size: Small 28", Medium 29", Large 30", XL 31", XXL 32", and XXXL 33"