Fat Mattress are primarily known as the just-post-Jimi Hendrix Experience band of Noel Redding, putting out a couple of albums in the late 1960s and early 1970s. The Jimi Hendrix connection was probably responsible for gaining Fat Mattress much of whatever attention they managed to attract. It might have been a double-edged sword, however, as Fat Mattress' music wasn't at all similar to what Redding had played with Hendrix, being in far lighter folk-rock, psychedelic, and early prog rock styles, and integrating plenty of vocal harmonies.
These are photos from concerts where Fat Mattress played, so they may be of other bands that played the concert as well.
Jimi Hendrix / Fat Mattress May 24, 1969 San Diego, California, United States Uploaded by Zimtrim
Jimi Hendrix / Fat Mattress May 23, 1969 Seattle, Washington, United States Uploaded by Zimtrim
Jimi Hendrix / Fat Mattress May 22, 1969 Vancouver, British Columbia, Canada Uploaded by Zimtrim
Jimi Hendrix / Chicago / Fat Mattress May 10, 1969 Charleston, West Virginia, United States Uploaded by Zimtrim