Have you met the lumbersexual: all beards, flannel shirts, and work boots?
Wearing dashikis, yukatas, and flannel robes—any kind of billowing uni-garment will do the trick.
Although there was that grungy-vibe (flannel shirts and biker boots), it was girly, young even.
He was unshaven, with a full mustache and wearing a flannel shirt over a hooded sweatshirt.
Mehlman, a man seemingly born in a well-pressed suit, basked in the victory, relaxed in a flannel shirt.
In a word, I had nothing on me but my drawers and a flannel shirt.
Let it steep fourteen days, and then strain it through a flannel bag.
Gather them while the shells are very soft, and rub them all with a flannel.
He wore, indeed, a shabby greenish-gray suit, and a flannel shirt.
In hot weather I place a piece of ice in flannel on the top of the pail.
c.1500, probably from Welsh gwlanen "woolen cloth," from gwlan "wool," from Celtic *wlana, from PIE *wele- "wool."
The Welsh origin is not a universally accepted etymology, due to the sound changes involved; some (Barnhart, Gamillscheg) suggest the English word is from an Anglo-French diminutive of Old French flaine "a kind of coarse wool." "As flannel was already in the 16th c. a well-known production of Wales, a Welsh origin for the word seems antecedently likely" [OED]. Modern French flanelle is a 17c. borrowing from English.