Mountain Vest
From Inkipedia, the Splatoon wiki
The Mountain Vest is clothing in Splatoon. It is 3-star rarity produced by the Inkline clothing brand and comes with the main ability, Swim Speed Up.
It can be purchased from Jelly Fresh for 11,000 cash.
Appearance
Abilities
The Mountain Vest comes with the Swim Speed Up ability as a main ability.