Jellyvader Cap

Appearance
The Jellyvader Cap is a black leather flat-bill cap. On the front are two light blue, pixelated jellyfish, which change color to match the player's current ink color, along with the Skalop logo embroidered on the back. A white sticker of the logo is placed under the bill. In Splatoon 3, the cap can be rotated to instead face backwards using the 'Adjust Gear' feature.

Splatoon 3
The Jellyvader Cap returned in the Chill Season 2022 update on 2022-12-01.

Trivia

 * The Jellyvader Cap exists in real life, sold by KOG.

Etymology
Jellyvader is a portmanteau of "jellyfish" and "invader", likely named due to the similarity of the pixelated jellyfish pattern to the enemies from the game Space Invaders.