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Iron Heart 391-WHT - Work Shirt - 13.5oz White Denim
Iron Heart 391-WHT - Work Shirt - 13.5oz White Denim

Iron Heart

391-WHT - Work Shirt - 13.5oz White Denim


Garment Measurements | Virtual Size Chart


The Iron Heart IHSH-391-WHT Work Shirt is a heavyweight, reinforced piece produced from a 13.5 oz. sanforized and rinsed Japanese Denim that's appropriate as a style staple for year-round use. Using the signature Iron Heart Work Shirt pattern, this piece is perfectly proportioned in length to be worn untucked for modern, vintage-styled grit. White tonal stitching and bobbin thread combine with the pure bleach-white warp and weft non-selvedge denim to convey workshop class and provide an excellent palette for patina potential. This Work Shirt has numerous and carefully considered construction and design details like the squared shoulder and back yoke panel, which is paired with signature Iron Heart cats eye buttons on the front placket and dual patch front chest pockets with pencil slot, comprising a piece for the stylistically sound and self-reliant. Further, internal felled seams and chainstitched construction with inseam run-off give this piece all the necessary heritage provenance and then some. The White Denim Work Shirt balances classic and modern applications, making it a future heirloom, a year-round go-to, and a substantial staple piece that will only improve with wear. Built for the biker and over-engineered to start, the Iron Heart 391-WHT Work Shirt tests the limits of what can be artfully woven and sewn, delivering a lifetime of durability in a work-ready design.


  • Standard Fit
  • 13.5 oz. Japanese Denim
  • Sanforized - One Wash
  • Pure White Bleached Warp & Weft
  • 100% Cotton
  • White Thread Chainstitching
  • Dual Button Front Chest Pockets
  • Pencil Slot Chest Pocket
  • Back Yoke Panel
  • Button Cuffs
  • White 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 XL

Iron Heart Shirting sizing is graded in small increments. The 391-WHT runs true to Iron Heart sizing and is made with a sanforized, once-washed fabric with most shrinkage removed. With regular use, one can expect up to .5” of stretch 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