Iron Heart - Ihsh-Brund-Anniversary-UHF-Navy

Since Brund opened in 2004, the blue denim shirt has been part of our unofficial shop uniform.

From the moment we started carrying Iron Heart in 2018, their Ultra Heavy Flannel (UHF) shirts quickly became favourites for both us and our customers. 

So to celebrate our 20th anniversary with a special Iron Heart collaboration, it made perfect sense to combine these two iconic garments.

We asked Haraki-san to design a fabric that combines the timeless look of a denim shirt with the unbeatable softness and warmth of Iron Heart’s legendary UHF. What he came up with blew our minds; a solid dark navy flannel with distinctive twill lines, subtly contrasted by the grey back. It has the visual appeal of denim with the soft touch of flannel.

Made from 12 oz. Aspero cotton, sourced from the foothills of the Andes mountains, the shirt has a double-brushed interior for extra softness and a heft that makes it nearly windproof.

And because it’s not indigo-dyed, there’s no fading—this shirt stays true to its rich colour. Whether you’re a fan of denim, flannel, or both (like us),

We think this shirt represents the best of both worlds. 

Key Features:

- Made in Japan

- 12 oz. ultra-heavyweight flannel

- Woven from 100% Aspero cotton

- Reactive dyed warp and weft—won’t fade

- Single-brushed face, double-brushed interior for warmth and softness

- Black Permex snap fastenings

- Western silhouette with flap patch pockets

- Limited edition, made exclusive for Brund

- One-washed, but could shrink up to half a size with continual or very hot washing/tumble drying

- NB: The shirt Henrik wears, which is the one in the details shots, has been machine-washed twice to test for shrinkage and colour change.

What sets Aspero cotton apart? It is a naturally occurring wild cotton. This makes it one of the purest cottons available. As it is not farmed for mass production, it has been highly prized for generations by the indigenous Peruvian population for its qualities of fineness, softness, volume, and also strength.