A Perfect Circle is an alt rock band formed in Los Angeles, California in 1999 by guitarist Billy Howerdel and Tool vocalist Maynard James Keenan. Due to Keenan’s other musical commitments, the band has long periods of downtime and featured a variety of musicians throughout alternating periods of activity and inactivity, and has changed line-ups on each album, leaving Keenan and Howerdel the only constant members. Despite the varied cast and numerous lineup changes, the primary roles of creating A Perfect Circle‘s songs has remained consistent with Howerdel as music composer, and Keenan writing lyrics and vocal melodies. The band’s studio albums have been generally well received critically and commercially. Although not circular, these Perfect Circle t-shirts are alt cool.