Defcon T-Shirt Mens XL. 2011 Rio Hacker Vegas & Defcon 2012. Lot Of 2. Pre-Owned Excellent Condition Smoke Free Home. This Defcon T-Shirt is a must-have for any hacker or car enthusiast. The shirt features a solid black and gray color scheme with a graphic print of the Defcon logo. It is made of a comfortable cotton blend material and has a classic fit with short sleeves and a crew neckline. The shirt is machine washable and has tagless features for added comfort. It is available in size XL and is perfect for any season, whether it be winter, summer, fall, or spring. This T-Shirt is a great addition to any wardrobe and is sure to make a statement.