Octo Tee
From Inkipedia, the Splatoon wiki
The Octo Tee is a type of clothing in Splatoon. It is a 3-star item produced by Cuttlegear and comes with the main ability Haunt.
Appearance
Unlock
This item cannot be purchased. Instead, the player must reach Level 45 and talk to Judd, where he will give the player the item.