Sporty Bobble Hat
From Inkipedia, the Splatoon wiki
The Sporty Bobble Hat is a type of headgear in Splatoon. It is a 1-star item produced by Skalop and comes with the main ability Tenacity.
This item can be purchased from Cooler Heads for 900 Cash.
Appearance
A mostly black, soft bobble hat with a strip near the top to represent the Inkling's current ink color.