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Iron Heart 251-RED - Work Shirt - 9oz Selvedge Flannel Check Red & Dark Indigo
Iron Heart 251-RED - Work Shirt - 9oz Selvedge Flannel Check Red & Dark Indigo

Iron Heart

251-RED - Work Shirt - 9oz Selvedge Flannel Check Red & Dark Indigo


Garment Measurements | Virtual Size Chart


The 251-RED Work Shirt is a heavyweight, reinforced piece produced from a once washed 9 oz. Japanese Selvedge Unbrushed Flannel that's appropriate for year-round use with a traditional big check pattern that revives workman to gangster style references with an advanced disposition. Using extremely dark indigo dyed yarns that read almost black and contrasted with red for a classic palette that is designed to evolve, this shirt will convey that workshop class through fading and patina potential. Using the signature Iron Heart Work Shirt pattern, this piece is perfectly proportioned in terms of 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 placket, which is paired with signature Iron Heart vintage black 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, selvedge line reveals, internal felled seams, and chainstitched construction with inseam run-off give this piece all the necessary heritage provenance, and then some. The Selvedge Flannel Check Work Shirt strikes the balance between classic and modern applications, making it a future heirloom, a year-round go-to, and a new project piece that will only get better with wear. Built for the biker and over-engineered to start, the Iron Heart 251-RED tests the limits of what actually can be artfully woven and sewn, delivering a lifetime of durability in a shop to street ready design.


  • Standard Fit 
  • 9 oz. Japanese Selvedge Unbrushed Flannel 
  • Once Washed
  • Indigo Dyed
  • Red Selvedge Line
  • 100% Cotton
  • Dual Button Front Chest Pockets
  • Pencil Slot Chest Pocket
  • Square Shoulder Yoke
  • Interior Placket and Cuffs Selvedge Line
  • Button Cuffs
  • Black Cats Eye Buttons
  • Felled Seams
  • Chainstitched Throughout & Run-off
  • Bartack Reinforced
  • Made in Japan


Model Measurements: 5'10" | 160 lbs. | 40" Chest | 32" Waist - Wearing Size M

The Iron Heart 251 runs true to size and is made with a once washed fabric. Most shrinkage is removed, and it will stretch approximately .5" in the chest with one month of regular use.

We recommend consulting our Sizing Guide and using our Virtual Size Chart.

Please feel free to Contact Us for additional assistance.

About Iron Heart

After 20 years of working in the garment industry in Japan, Shinichi Haraki established Works Inc a.k.a. Iron Heart in 2003 as a heavyweight Japanese clothing brand, initially aimed at the Japanese motorcycling community. Over the years and in partnership with the UK heritage community, the brand has become the pinnacle definition of bullet-proof garment construction. Originally made for bikers, Iron Heart pushes the design and construction of the clothing to the limit of what can actually be woven and... View All Iron Heart Products