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Iron Heart DR 434-ABC - CPO Shirt - Fox Brothers® Wool Arsenic Barleycorn Flannel
Iron Heart DR 434-ABC - CPO Shirt - Fox Brothers® Wool Arsenic Barleycorn Flannel

Iron Heart

DR 434-ABC - CPO Shirt - Fox Brothers® Wool Arsenic Barleycorn Flannel


Garment Measurements | Virtual Size Chart


The Iron Heart x Division Road IHDR-434-ABC CPO Shirt coming in the Fox Brothers® Wool Arsenic Barleycorn Flannel is a pattern and design development based on the original Chief Petty Officer garment that became a standard military issue for decades due to its endless utility. This exclusive collaboration is supremely enhanced in material, pattern, and fit as a versatile wool base or layering shirting option with vintage style and durability for an elevated, modern wardrobe. Remaining true to the originals with a heritage update, the 434 CPO Shirt is made in a limited bolt, medium weight 14 oz. Arsenic Grey Barleycorn 'South West' Flannel produced at the 200-year-old original Somerset mill by the world famous Fox Brothers® using the finest 100% British Lambswool in a highly worsted, suiting grade fabric engineered for the outdoors. Since 1772, Fox Brothers has produced top-tier textiles used in a multitude of applications, from Savile Row tailoring to British Military garments. By sourcing the best fibers from around the world and using intensive hand-driven milling and cording processes, they produce fabrics of the highest grade with comfort, density, and durability all wrapped into one. This incredibly flexible and robust cloth comes in a natural palette to reflect the oft-darkened, earthy tones found in the Devon countryside with a rare and dimensional barleycorn woven of charcoal, black, and grey for a sophisticated aesthetic and luxurious finish. This CPO Shirt has numerous and carefully considered construction and design details like buttoned flap front chest pockets, an integrated chest pencil pocket, tonal cotton twill lining for the collar and cuffs, military-grade reproduction melamine buttons, and is constructed with internal felled and chainstitched seams throughout to give this piece all the necessary heritage provenance, and then some. The Fox Bros Wool CPO Shirt strikes the balance between classic and modern, making it a future heirloom with endless all-season applications. Delivering a lifetime of durability in a work-ready design, the Iron Heart x DR 434-ABC collaboration was designed to fuse military, workwear, and moto club inspirations, materials, and production techniques to create an evolved collectible for our Division Road Army on their journey from the barracks to the battlefield.


  • Exclusive to Division Road
  • Standard Fit
  • 14 oz. Fox Brothers® South West Arsenic Grey Barleycorn Flannel (UK)
  • 100% Lambswool Worsted Cloth
  • Charcoal Cotton Twill Lined Collar, Cuffs & Trims
  • Buttoned Flap Front Patch Chest Pockets
  • Chest Pencil Slot & Pocket
  • Button Cuffs
  • Black Military Melamine Buttons
  • Felled Seams
  • Chainstitched Throughout
  • Bartack Reinforced
  • Dry Clean Only
  • Made in Japan


Model Measurements: 5'9" | 150 lbs. | 38" Chest | 32" Waist - Wearing Size S

Iron Heart Shirting sizing is graded in small increments. The 434-ABC runs on the true side of Iron Heart sizing, and is made with a worsted wool flannel that will remain static over the long term. Consider going with your common or the larger of your size range in Iron Heart.

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 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