Iron Heart

Ultra Heavy Flannel Crazy Check Work Shirt - Navy

$299 $350



To a great extent, Iron Heart's ultra heavy flannel (UHF) shirts define Iron Heart: heavy, rugged, but amazingly wearable. This work shirt is an exclusive navy 'crazy check' 12oz fabric, woven with Aspero cotton from the foothills of the Andes mountains. They double brush it on the inside and single brush it on the outside, resulting in a very soft yet substantial, thick, warm and windproof flannel.


  • Made in Japan
  • Work shirt
  • Iron Heart original 12oz ultra-heavyweight navy crazy check cotton flannel
  • UHF (ultra heavy flannel)
  • Aspero cotton
  • Single brushed on face and double brushed on reverse
  • Black cat's eye buttons
  • Single and double-needle stitch construction
  • Orange bobbin thread and chainstitch run-off
  • One-washed - potential to shrink half a size with continual or very hot washing/tumble drying




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