To a great extent, their ultra heavy flannel (UHF) shirts define Iron Heart heavy, rugged, but amazingly wearable. The 12oz fabric is 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. This shirt is wardrobe staple - a work cut in red/black buffalo check.
Made in Japan
Iron Heart original 12oz ultra-heavyweight red/black buffalo check cotton flannel
Woven withasperocotton yarn
Fabric single brushed on face, and double brushed on reverse
Double and single needle stitch construction
Orange bobbin thread
One-washed, but could shrink up to half a size with continual or very hot washing/tumble drying