Flak jacket (Earth-2356)

A flak jacket were an item of protective clothing popular among Jedi. Flak jackets have several pockets and pouches that could be used to store and quickly access weapons and other supplies.

When on missions, they provided at least partial protection from damage by blunt-force trauma, shrapnel, other projectiles, and even blades. Flak jackets started being worn around the time of the First Stark Hyperspace War, replacing the plate armor common during the Warring States Period. They could be worn by Jedi of every rank, but are mostly worn by those of Padawan rank or higher.

Each sect of the Jedi Order, planet, and several other armed factions has their own design or designs of flak jacket.

Source

 * https://naruto.fandom.com/wiki/Flak_Jacket.