The band members, who have Down Syndrome or are autistic, met through a music workshop run by Lyhty (meaning "lantern"), a charity based in Helsinki that offers services for people with developmental disabilities.

The band's driving force is guitarist Pertti Kurikka, while Kari Aalto sings and writes lyrics, the bass player is Sami Helle, and Toni Välitalo is on drums.

PKN is short for Pertti Kurikan Nimipäivät (meaning Pertti Kurikka's Name Day).

The band were put together by Kalle Pajamaa, who works at Lyhty.

Pajamaa told BuzzFeed News: "Of course we want to show the world that disabled people can do and perform music as so-called normal people."