Chaber'Jack is a Breton traditional music band formed in 1984 in Mayenne; its name combines the first syllables of its three founders' first names (Charly, Bertrand, Jacky). With bombarde, biniou, flutes and diatonic accordion, the band has been playing fest-noz dances, balls and festivals for more than forty years.
It played the very first Mouillotins festival, on 3 May 1998 in Cuillé.
