Open Source Defense Logo T-Shirt


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It’s the year 2127. Society is a loose network-of-networks, and all communication happens through open-source platforms that are encrypted end-to-end, all the way down to the OSS hardware that’s embedded behind your ear to give you access to the internet’s brain APIs. But when you go into town for resupply, how will people know which crew you’re down with?

Our ballcap is one idea, but not everybody’s a hat person. So this t-shirt is all-purpose, low-profile OSD gear for everybody. It’s heavyweight organic cotton. Hangs nice, and holds up to abuse.

Ably does the job of covering your torso. And rocks some subtle OSD affiliation at the same time.

Product details

  • 100% cotton, 6 oz/yd²
  • Preshrunk jersey knit
  • Seamless double-needle 7/8″ collar
  • Taped neck and shoulders
  • Tear-away label
  • Double-needle sleeve and bottom hems
  • Quarter-turned to eliminate center crease

Size Chart

Length 28 29 30 31 32
Width 18 20 1/2 22 1/2 24 1/2 26 1/2


Weight 6 oz

Black, White


S, M, L, XL, 2XL