Shopping Bag
Iron Heart 21-BLK - Work Shirt - 10oz Selvedge Chambray Black
Iron Heart 21-BLK - Work Shirt - 10oz Selvedge Chambray Black

Iron Heart

21-BLK - Work Shirt - 10oz Selvedge Chambray Black


Garment Measurements | Virtual Size Chart


The Iron Heart 21-BLK Work Shirt is a medium weight, reinforced piece produced from a 10 oz. sanforized and rinsed Japanese Selvedge Chambray 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 terms of length to be worn untucked for modern, vintage-styled grit. White contrast stitching combines with the black reactive dyed warp and a natural weft to create a textured medium grey Chambray that will soften and wear-in without any significant fading to convey workshop class in a versatile and consistent greyscale palette. This Work Shirt has numerous and carefully considered construction and design details like the squared shoulder placket triple stitched back yoke, which is paired with signature Iron Heart cats eye buttons on the dual patch front chest pockets with pencil slot, comprising a piece for the stylistically sound and self-reliant. Further, selvedge line reveals on the placket and cuffs, internal felled seams, and chainstitched construction with inseam run-off give this piece all the necessary heritage provenance, and then some. The Black Selvedge Chambray Work Shirt strikes the balance between classic and modern applications, making it a future heirloom, a year-round go-to, and a substantial staple piece that will only get better with wear. Built for the biker and over-engineered to start, the Iron Heart 21-BLK Work Shirt tests the limits of what actually can be artfully woven and sewn, delivering a lifetime of durability in a work-ready design.


  • Standard Fit
  • 10 oz. Japanese Selvedge Chambray
  • Sanforized - One Wash
  • Reactive Dyed Black Warp & Natural Weft
  • Red Selvedge Line
  • 100% Cotton
  • Contrast White Stitching
  • Dual Button Front Chest Pockets
  • Pencil Slot Chest Pocket
  • Triple Stitch Back 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: 5'11" | 165 lbs. | 40" Chest | 32.5" Waist - Wearing Size M

The Iron Heart 21 runs true to size on the large side and is made with a sanforized and 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