We design a DC404 t-shirt for each year’s DEF CON. We post the URL for ordering a t-shirt on the DC404 email list so if you want one you will have to subscribe.
We are currently working on the design for the DEF CON 24 t-shirt which will be posted here when it is done.
This is the design for the DEF CON 20 t-shirt.
designed for @dc404 by @kravatron
Front (top)
and Back (bottom)