Def Con 21 Sumo Ladies Shirt designed by Grifter for DEFCON 21 for the ladies. Each year at DEF CON Grifter has rolled out a custom designed t-shirt and 2013 was no different. This is Grifter’s t-shirt design from DEFCON 21 which was initially sold out the official swag booth. In the past Grifter and his wife have been seen in the vendor area but they decided to mix it up for DC21 and a lot of people didn’t get the memo and missed out on the shirt. Now’s your chance to get grifter’s official defcon 21 t-shirt available in mens, ladies and youth.