Fourway stretch construction maintains unrestricted mobility

To a great extent, our 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. We 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 a wardrobe stapleseen here in our work shirt cut with a blue American check.

Because we now use a reactive dyeing process for our UHF fabricsas opposed to the direct dye technique used on older variationsthis plaid features a subtler colour palette compared to the vibrant checks from previous seasons. Whereas those older direct-dyed fabrics would mellow in appearance after a few washes, this new dyeing method is far more colourfast. To counter this, weve muted the colours slightly to offer a more worn-in appearance from the get-go.

Shearresistant inner layer prevents fabric bunching during activity