Sleep is a stoner rock band hailing from San Jose, California. Formed in 1990, the band emerged from the remains of Asbestosdeath and consists of Al Cisneros on vocals and bass, Matt Pike on guitar, and Chris Hakius on drums.
After their initial breakup, Matt Pike went on to form High On Fire while Al Cisneros and Chris Hakius reunited in OM. In 2009, Sleep reunited for two sets at All Tomorrow's Parties. The following year, they resumed touring with drummer Jason Roeder replacing Chris Hakius.
With their unique sound and powerful performances, Sleep has become a legendary name in the stoner rock genre.