SO AI — THE FIRST MARK / F001. The original mark. Small enough to wear without an explanation; curious enough to start one.

A crisp white unisex T-shirt with the black SO AI brushstroke signature on the wearer’s left chest. Clean back, no extra slogan. The founding design in THE OG COLLECTION.

Human ideas. Better together.

The shirt

Gildan 5000 unisex heavy cotton T-shirt, white
Small black left-chest front print
Plain back
F001 — THE FIRST MARK identity printed inside the collar
Sizes S, M, L, XL and 2XL

Size guide

Gildan 5000 garment measurements, laid flat (length × flat chest width).

Size	Width / flat chest	Body length
S	45.7 cm / 18 in	71 cm / 28 in
M	50.8 cm / 20 in	73.7 cm / 29 in
L	56 cm / 22 in	76.2 cm / 30 in
XL	61 cm / 24 in	78.7 cm / 31 in
2XL	66 cm / 26 in	81.3 cm / 32 in

Compare with a T-shirt you own, laid flat: measure straight across the chest and from the high point of the shoulder.

Made to order

Printed for SO AI by our production partner, Printful. £39.48 delivered (£34.99 + £4.49 UK delivery). Free delivery when you buy two or more shirts. Production and delivery estimates are shown at checkout and in your order confirmation.

Design and returns

Developed and finished by SO AI with AI-assisted visual tools. This is a physical printed T-shirt, not a digital download. Your statutory consumer rights are unaffected by the collection’s fictional storytelling.

The original. Allegedly.

Independent SO AI clothing. Not official merchandise from any AI platform.

original logo shirt

F001 — THE FIRST MARK