Iron Heart IHSH-341-BLK Ultra Heavy Flannel Herringbone Check Work Shirt - Black

As heavyweight flannels go, the Iron Heart Ultra Heavy Flannels are the champs. They get softer with wear and will most likely outlast you and anything else in your closet. The UHFs are made of Aspero cotton - a naturally occurring wild cotton from the foothills of North East Peru. It's actually a tree (yes, a tree!) so it's one of the purest, most organic forms of cotton in the world. It cannot be mass produced and has been prized by the Peruvians for centuries for its softness, fineness, volume and strength.  This work shirt is an exclusive black 'herringbone check' which weighs in at 13oz, slightly heavier than their standard UHF fabric because of the herringbone weave.


  • Work shirt
  • Aspero cotton
  • Iron Heart original 13oz ultra-heavyweight black herringbone check cotton flannel
  • Fabric is single brushed on the outside, double brushed on the inside
  • Black cat's eye buttons
  • Two external snap fastened chest pockets
  • Single, double and triple needle stitch construction
  • Yellow bobbin thread and chain stitch run-off
  • One-washed - potential to shrink half a size with continual or very hot washing/tumble drying

What it's made out of

  • Iron Heart exclusive black herringbone check ultra-heavyweight flannel

Where it's Made

  • Japan


  • We recommend taking one size up from your normal shirt size, or taking your normal Iron Heart shirt size


  • These measurements are for the units we have in stock
  • Please note, if we have multiples of the same size, these measurements are for one unit and there may be variations between the same size
  • To see how we measure click here
  • Please contact us if there are any questions about the measurements!

M 21.5 28 25.625 17
XL 22.875 29.25 26.5 18.5
XXXL 24.625 30.5 28 20.25


  • World-wide shipping via (USPS/UPS/FedEx/DHL). You will receive a tracking number via email.
  • Low flat rate shipping. Free shipping over $250 on domestic orders. Please seeShipping, Returns, and Exchanges” under our “INFO” tab on any page for up-to-date shipping rates.
  • Most packages are shipped via USPS or UPS in the lower 48.
  • Orders shipped to an APO/DPO address are shipped via USPS.
  • International orders are shipped primarily through DHL or UPS. Please be aware that the customer is responsible for any local customs or duties placed on the package upon arrival. As we ship worldwide, we have no knowledge of country specific import taxes, so please refer to guidance from your local government.


  • We accept returns for full refunds within seven (7) days of the order delivery date.
  • Store credit for returns will be issued within fourteen (14) days of the order delivery.
  • All Items for return or exchanges must be postmarked within the seven (7) day period after authorization.


  • We carry limited quantities of many items. To ensure an exchange can be fulfilled, contact us at;.

Please Note!!!

  • Franklin and Poe is not responsible for shipping costs on exchanges or returns.
  • We only accept items for return or exchange if they are in new condition with original tags, unworn and unaltered.
  • All merchandise purchased on sale, grooming products, underwear, and consignment are final.


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