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Iron Heart 382-BLU - Work Shirt - 9oz Selvedge Flannel American Blue Check
Iron Heart 382-BLU - Work Shirt - 9oz Selvedge Flannel American Blue Check

Iron Heart

382-BLU - Work Shirt - 9oz Selvedge Flannel American Blue Check


Garment Measurements | Virtual Size Chart


The Iron Heart IHSH-382-BLU Work Shirt is a heavyweight, reinforced piece produced in a once-washed 9 oz. Japanese Selvedge Unbrushed Flannel that's appropriate for year-round use. A bold, large-scale American check with deep indigo on a white field with blue and yellow accents is an updated and versatile pattern in a traditional workwear palette. Extremely dark rope-dyed indigo yarns, designed to fade from an almost black to shades of blue, are woven with reactive dyed accents designed to stay true in color to convey a layered patina and workshop class. Leveraging the signature Iron Heart Work Shirt pattern, this piece is perfectly proportioned in length to be worn untucked for modern vintage-styled grit. This Work Shirt has numerous and carefully considered construction and design details like the squared shoulder and back yoke panel, which is paired with Iron Heart tonal blue cats eye buttons on the dual patch front chest pockets with pencil slot, placket, and cuffs to make a piece for the stylistically sound and self-reliant. Further, red selvedge line reveals, internal felled seams, and yellow thread chainstitched construction with inseam run-off give this piece all the necessary heritage provenance and then some. The Selvedge Flannel American Check Work Shirt balances classic and modern applications, making it a future heirloom, a year-round go-to, and a new project piece that will only improve with wear. Built for the biker and over-engineered to start, the Iron Heart 382-BLU tests the limits of what can be artfully woven and sewn, delivering a lifetime of durability in a workshop-to-street-ready design.


  • Standard Fit 
  • 9 oz. Japanese Selvedge Unbrushed Flannel 
  • Proprietary Fabric
  • Once-Washed
  • Red Selvedge Line
  • Rope Dyed Indigo & Reactive Dyed Yellow & Blue
  • 100% Cotton
  • Yellow Thread Interior Chainstitching
  • Dual Button Front Chest Pockets
  • Pencil Slot Chest Pocket
  • Back Yoke Panel
  • Interior Placket and Cuffs Selvedge Line
  • Button Cuffs
  • Blue Cats Eye Buttons
  • Felled Seams
  • Chainstitched Throughout & Run-off
  • Bartack Reinforced
  • Limited Release
  • Made in Japan



Model Measurements: 5'9" | 165 lbs. | 41" Chest | 34" Waist - Wearing Size L

Iron Heart Shirting sizing is graded in small increments. The 382-BLU runs true to Iron Heart sizing and is made with a once-washed, unbrushed flannel fabric. With regular use, one can expect up to .5" of shrinkage in the chest over the long term.

Our Method of measuring is different than Iron Heart. We recommend consulting our Sizing Guide and using our Virtual Size Chart to reference our Method when purchasing.

Please feel free to Contact Us for additional assistance.

About Iron Heart

After 20 years of working in the Japanese garment industry, Shinichi Haraki established Works Inc., a.k.a. Iron Heart, in 2003 as a heavyweight clothing brand initially geared toward Japan’s motorcycling community. Iron Heart creates classic and timeless clothing crafted out of the finest materials and achieves the highest standards by closely working with fabric development, garment manufacturing, and the brand’s cult community. Over the years, Iron Heart has become the definition of bullet-proof garment construction. Staying true to their slogan,... View All Iron Heart Products