Rancid is an American punk rock band formed in Berkeley, California, in 1991. The band consists of notable members Tim Armstrong and Matt Freeman, both formerly of Operation Ivy. Rancid is known for their fusion of punk with elements of ska, reggae, and rockabilly, a sound best exemplified in their critically acclaimed album "And Out Come the Wolves". As one of the most significant bands from the 1990s punk revival, their influence can be felt throughout the genre.