Collection: Heavyweight Flannel Shirt

BIG JOHN's Signature Heavyweight Flannel Shirt – Where Heritage Meets Craft

With a legacy rooted in craftsmanship and authenticity, BIG JOHN proudly presents its iconic heavyweight flannel shirt — a beloved staple among denim and workwear enthusiasts. Built to last and designed to be worn season after season, this shirt blends traditional flannel aesthetics with elevated, modern-day sensibility.

Every detail, down to the buttons, reflects thoughtful design. From color-chipped cat-eye buttons inspired by vintage workwear, to diamond-engraved details and rich nut-toned finishes — each shirt tells its own story. The Western model is finished with lustrous pearl snap buttons, adding an authentic retro touch.

At the heart of this collection is a specially developed flannel fabric, woven in Niigata — one of Japan’s most renowned textile-producing regions. Compared to standard flannel, this fabric is thicker, denser, and slowly woven by skilled artisans. It results in a shirt that feels as substantial as it looks.

The yarns are just as intentional: premium American cotton is used throughout, with thick straight yarns for the warp and uniquely textured slub yarns for the weft. The finished fabric is brushed on the reverse side, delivering a warm, voluminous texture that invites touch.

The result is a fabric that evokes the essence of true vintage flannel — rich in texture, weight, and visual character. One touch is all it takes to understand its unmatched quality.

Even the label reflects our commitment to tradition. Made from soft rayon — a rare choice today — it recalls the charm of vintage apparel and enhances the overall tactile experience.

Whether worn as an overshirt during crisp fall mornings or layered under outerwear in the depths of winter, this is flannel reimagined the BIG JOHN way: rugged, refined, and deeply rooted in heritage.