The garment
- Fabric
- 100% combed ring-spun cotton, soft mid-weight jersey (heather shades blend polyester)
- Fit
- Unisex regular fit, side-seamed — true to size
- DTG print: water-based ink injected straight into the cotton fibre, not a layer glued on top. Made to order in Europe
- Care
- Machine wash cold, inside out · no bleach · hang dry
Wear the ultimate insider badge with the 'Undocumented Feature' tee, celebrating the chaotic genius and mysterious quirks hiding deep inside the machine. Bold, witty, and unapologetically clever, this shirt transforms everyday tech chaos into pure wearable attitude.
Designed for programmers, sysadmins, hardware hackers, and cyber-enthusiasts who know that the best systems are always powered by a little bit of mischievous wizardry.
Size guide
| Measure yourself | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Length | 69 | 71 | 74 | 76 | 79 | 81 | 84 |
| Chest | 79–86 | 86–94 | 97–104 | 107–114 | 117–124 | 127–135 | 137–145 |
Measurements are provided by suppliers. Product measurements may vary by up to 2 ″ (5 cm).
More measurements
| Garment measured flat | XS | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|---|
| Length | 69 | 71 | 74 | 76 | 79 | 81 | 84 |
| Width | 42 | 46 | 51 | 56 | 61 | 66 | 71 |
Measurements are provided by our suppliers. Product measurements may vary by up to 2" (5 cm). Pro tip! Measure one of your products at home and compare with the measurements you see in this guide.
Undocumented Feature Gremlin Tee
- Design locked forever: yours and no one else's
- QR authenticity label printed on the garment
- Free shipping
- Bonus credits with every purchase
Design generated with artificial intelligence and curated by GLARKE. A unique 1/1 piece.
While it's here, it belongs to no one.