Both of these T-shirts are based on the in-game brand "SquidForce", faithfully reflecting how they look in the game. The size and placement of the prints were re-arranged to make the squid world's clothes fit on humans as well.
Pinback buttons giving away
The tag on the edge of the T-shirts bears the SquidForce logo. It will also come with a Pinback button. Orders will be accepted until September 26, 2022.
Source: Famitsu
Contributed by nado