School Uniform
From Inkipedia, the Splatoon wiki
The School Uniform is a Clothing item that can only be obtained through the Inkling Girl Amiibo. It's ability is Ink Recovery Up (Increases ink-tank refill rate while submerged in squid form.)
Unlock Requirements
Complete the 4 missions the Amiibo gives you to unlock it:
Boss 2 Shootin' the Sneeze... The Dreaded Octonozzle!
Appearance
By default, the School Uniform consists of a black jacket, a white and cream colored undershirt, and a tie. If the wearer is female, the uniform gains a skirt that changes color depending on what color the wearer's ink is.
