Mike Watt started wearing flannel shirts at age 13 to emulate John Fogerty of Creedence Clearwater Revival.
As young kids, Mike Watt and bandmate D. Boon were quick friends. The reason why Mike Watt wore the flannel shirts that eventually became his signature look as the bassist of Minutemen is actually a very sweet one. In Watt's words: "At that time the only rock band [D. Boon] knew was Creedence Clearwater Revival and when his ma put me on bass and I tried to learn those tunes, for the life of me I couldn't hear what was going on. So I thought if I wore John Fogerty's shirts he would still like me."
In 2012, Watt teamed up with Altamont Apparel to recreate his signature flannel shirt, which appears on the cover of the Minutemen album Double Nickels on the Dime.