What is Iron Heart denim

Iron Heart is a Japanese brand founded in 2003 by Shinichi Haraki, a former designer at Edwin. The brand specializes in ultra-heavyweight selvedge denim, often ranging from 14oz to 25oz, designed to withstand the rigors of motorcycle riding. Their garments are crafted with meticulous attention to detail, combining traditional Japanese techniques with durable materials

How does Iron Heart's denim compare to other Japanese brands

While brands like Kapital and Visvim focus on avant-garde designs and cultural narratives, Iron Heart emphasizes durability and functionality. Their denim is known for its weight and resilience, appealing to those seeking robust, long-lasting garments

How does Iron Heart's sizing compare to other brands

Iron Heart's sizing can differ from other brands, often running slightly smaller. It's recommended to consult their detailed sizing charts and consider sizing up if you're between sizes

What’s the best way to care for heavy denim

Wash infrequently, air dry, and spot clean as needed. For example, Iron Heart recommends turning jeans inside out and washing in cold water to preserve indigo and fabric strength

Can I wear heavyweight jeans in warmer weather

It depends on your tolerance, but many enthusiasts wear 14oz–17oz denim year-round. Iron Heart offers “lighter” heavyweights like 14oz and 17oz for summer wear, with breathable weaves and soft feel after break-in

What’s the difference between sanforized and unsanforized denim

Sanforized denim is pre-shrunk, while unsanforized denim can shrink significantly after the first wash. Iron Heart typically uses sanforized denim, offering consistent sizing and minimal shrinkage, which makes fit selection easier

What does 'one wash' denim mean

“One wash” refers to denim that’s been lightly rinsed to remove shrinkage. Iron Heart offers both raw and one-wash options, depending on whether you want to shrink your jeans yourself or get closer to final fit from the start

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Iron Heart 9oz Cotton Linen Work Shirt - Off White

Iron Heart

£305.00 GBP

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Product Description

Lightweight by Iron Heart standards, this 9oz work shirt blends the brand’s signature durability with warm-weather comfort. Made from a breathable cotton-linen fabric woven in a left-hand twill, it offers a softer feel and better airflow without sacrificing toughness.

Cut in Iron Heart’s classic work shirt silhouette, it’s triple-stitched at the major seams and reinforced with chainstitch runoff at the gussets - a build designed to go the distance.

The Off White colourway brings a clean, versatile look that pairs easily with denim or fatigues, softening subtly with wear over time. Finished with tonal hardware and utility focused details throughout.

- Iron Heart 9oz Cotton Linen Work Shirt.
- IHSH-414-WHT.
- Off White colourway.
- Triple-stitched side, sleeve, and shoulder seams.
- 9oz left-hand twill (90% cotton, 10% linen).
- Classic work shirt cut with straight back yoke.
- Dual patch pockets with pen holder.
- Side seam gussets with chainstitch runoff.
- Felled internal seams.
- Tonal four-hole buttons.
- Once washed – no shrinkage expected.
- Made in Japan.

What We Think

This shirt is a great pick if you want something durable but breathable for warmer days. The cotton-linen blend and left-hand twill weave give it a softer hand and better airflow compared to heavier shirting, while still feeling sturdy enough for everyday wear.

The classic work shirt cut is comfortable and functional, with triple-stitched seams and chainstitch gussets built for longevity. The off-white colour is clean and versatile, making it easy to style with everything from denim to fatigues. It also softens nicely with wear, adding to its appeal as a reliable wardrobe staple.

Sizing Information

All meaurements are in Metric (cm's).

Garment Care

All garments available at our store are highly considered, thoughtfully designed and superior crafted. They are beautiful and rare in nature and often made with natural / organic fibres. If you treat them well, they will last you a lifetime.

We always recommend to 'Wear More & Wash Less'.

If washing is necessary we always suggest to hand wash and use organic / premium soaps where available and a natural drying process.

Shipping Information

Shipping Policy

We know ordering online can feel risky so we’ve built our shipping around speed, transparency, and zero surprises.
We pack orders super fast, ship every morning & keep our shipping structure as clear and simple as possible.

Free Worldwide Shipping Rates

Free shipping on all orders over $500 AUD.
Applied automatically at checkout.

International Shipping (Flat Rates)

All Flat Rate orders are shipped with Australia Post.
Calculated FedEx & UPS pricing is also provided at checkout for your consideration.

Standard International Shipping ($20 AUD)

United States: $13 USD
United Kingdom: £10 GBP
Canada: $18 CAD
Japan: ¥2,000 JPY
South Korea: ₩17,000 KRW
Europe: €12 EUR
New Zealand: $22 NZD
Rest of World: $20 AUD (converted at checkout)

Express International Shipping ($30 AUD)

United States: $20 USD
United Kingdom: £16 GBP
Canada: $27 CAD
Japan: ¥3,000 JPY
South Korea: ₩26,000 KRW
Europe: €18 EUR
New Zealand: $33 NZD
Rest of World: $30 AUD (converted at checkout)

Australia Domestic Shipping

Free shipping on orders over $500 AUD.

Australia Post & Sendle discounted shipping rates
are provided at checkout for all orders under $500.

Order Processing

Orders placed Monday to Friday are shipped the same business day.
A tracking link is emailed as soon as your order is dispatched.

Duties, Taxes and Checkout Transparency

All duties, tariffs and taxes are completely covered by URAHARA.
The price you see at checkout is the price you pay, delivered to your door.

Returns and Exchanges

Customers are responsible for return shipping costs.
Items must be returned in original condition with all tags attached.
Shoes must be returned in their original box.
Original shipping costs are non-refundable unless the item is faulty.
Please refer to our full Returns Policy for details.

If you are unsure about sizing or fit, contact us before ordering and we can help you choose the right size.