Stoner rock band from San Jose, California, USA.
Sleep emerged in 1990 from the remains of Asbestosdeath, which featured members Al Cisneros (vocals/bass), Matt Pike (guitar), and Chris Hakius (drums).
After Sleep broke up, Matt Pike formed High On Fire, while Al Cisneros and Chris Hakius eventually reunited in OM (8). In 2009 Pike, Cisneros, and Hakius reunited to perform two sets at All Tomorrow's Parties. The following year, Pike and Cisneros resumed touring as Sleep, with drummer Jason Roeder (of Neurosis) replacing Chris Hakius.