Forty-two percent of Gen Z shoppers bought secondhand clothing in 2025, and a meaningful share of them were hunting specifically for what fashion coverage calls “throwback looks” — cargo pants, vintage denim, and the kind of plaid button-up that used to sit untouched on thrift store racks for months, according to recent reporting on the fashion resale market. The overall resale economy is projected to hit $3.5 billion by 2027, and flannel — the single most identifiable garment of 1990s Seattle — is riding that wave straight out of donation bins.

A Logging Shirt Long Before It Was a Statement

Flannel wasn’t invented in a Seattle basement — it was invented for actual outdoor labor. Pendleton Woolen Mills in Oregon developed its colorful flannel shirt lines in the 1920s specifically for logging work and outdoor recreation like hunting and fishing, decades before anyone associated the fabric with music at all, according to a documented history of the flannel shirt in American fashion. It picked up its first taste of youth-culture cool in the 1960s, when the Beach Boys — who originally performed as “The Pendletones” — helped popularize Pendleton’s wool shirts among California surfers. That’s a very different climate and subculture than the one that would eventually claim it, but the pattern of working-class fabric becoming a statement piece was already set.

Nirvana Didn’t Invent It, But They Made It the Uniform

The flannel shirt became grunge’s defining garment through Nirvana, Pearl Jam, Soundgarden, and Hole, all of whom wore it constantly through the early 1990s, cementing its place in Generation X’s visual identity as depicted later in films like Singles and Reality Bites, per the same fashion history record. It wasn’t styling in the traditional sense — it was closer to an anti-fashion statement, worn oversized and untucked over band T-shirts specifically because it was cheap, warm, and already sitting in a Pacific Northwest thrift store. That thrift-store sourcing is the detail that matters most for anyone hunting flannel today: the whole aesthetic was built entirely on secondhand and army-surplus shopping, not on anything designed to be trendy in the first place.

The Runway Noticed, Whether the Bands Wanted It To or Not

The jump from Pacific Northwest thrift racks to high fashion happened remarkably fast. Designer Marc Jacobs built his Spring 1993 Perry Ellis collection around grunge staples including flannel shirts, alongside printed slip dresses and combat boots, a show significant enough that it’s still cited as the moment grunge crossed into luxury fashion — documented grunge-fashion history notes designers including Calvin Klein and Anna Sui followed with their own grunge-influenced lines soon after. The reception from the scene itself was famously cold; flannel’s whole appeal was that it rejected exactly the kind of packaging a runway show represented, which is part of why the garment has always carried a slightly rebellious charge even decades later.

Why It’s Disappearing From Racks Again Now

What’s driving flannel off shelves today isn’t a single viral moment — it’s the broader mechanics of the current resale boom. Fashion online resale is growing at nearly double the pace of traditional apparel sales, and younger shoppers are turning to secondhand racks for both affordability and the creative appeal of building an outfit around something with an actual history, a dynamic tracked across recent secondhand-shopping market data. Flannel benefits doubly from that shift: it’s cheap enough to be an easy entry point for a Gen Z shopper testing out the grunge look, and it’s specific enough — plaid, cotton, boxy-cut, ideally with some visible fading — that TikTok and Instagram trend cycles keep reintroducing it to audiences who weren’t alive for the original moment.

None of that makes flannel rare in the way a discontinued designer piece is rare — millions of these shirts were produced across decades of workwear and outdoor-brand manufacturing. What’s changed is how many people are actively looking for the right one at the same time, competing over the same finite stock of secondhand shirts that predate the current production run. A garment built to survive a logging camp turns out to hold up just fine under thirty years of thrift-store handling, which is exactly why it’s still there to be found — for now, anyway.