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 staple – seen here in our work cut in navy/black ombré check.

[SIZE-GUIDE-INCH]

[SIZE-GUIDE-INCH]

Tag Size XS S M L XL XXL XXXL XXXXL

Shoulders 16.5 17.2 18.0 18.7 19.5 20.3 21.0 21.8

Length 27.3 28.0 28.5 29.2 29.8 30.3 31.0 31.6

Chest (P2P) 20.5 21.4 22.2 22.9 23.8 24.4 25.1 26.0

Waist 19.1 20.0 20.8 21.5 22.3 23.0 23.7 24.4

Opening 19.9 20.7 21.3 22.2 23.1 23.6 24.4 25.2

Sleeve 24.7 25.0 25.8 26.3 26.9 27.4 28.2 28.5

Sleeve Opening 4.3 4.4 4.6 4.7 4.8 5.1 5.2 5.4

[SIZE-GUIDE-CM]

Tag Size XS S M L XL XXL XXXL XXXXL

Shoulders 41.8 43.6 45.6 47.4 49.5 51.4 53.2 55.2

Length 69.2 71.0 72.4 74.0 75.6 77.0 78.7 80.1

Chest (P2P) 51.9 54.2 56.3 58.0 60.5 61.8 63.6 65.9

Waist 48.4 50.7 52.7 54.5 56.6 58.4 60.1 62.0

Opening 50.4 52.5 54.0 56.4 58.7 59.8 62.0 64.0

Sleeve 62.7 63.4 65.4 66.7 68.2 69.6 71.5 72.3

Sleeve Opening 10.9 11.2 11.6 11.8 12.3 13.0 13.2 13.6