Iron Heart
634S-18 - Straight - 18oz Vintage Selvedge Indigo
634S-18 - Straight - 18oz Vintage Selvedge Indigo
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Description
The Iron Heart IH-634S-18 in Vintage Indigo is an iconic cut, designed as a vintage-styled classic mid-rise Straight Tapered fit with a roomy seat, broad thigh, and a gentle tapered leg to a wide hem. This jean features the Iron Heart signature 18 oz. medium-weight, sanforized, and once-washed right-hand twill Japanese Selvedge Denim produced by the famed Shinya Mills, established in 1951, and is woven in a low-tension weave on vintage shuttle looms using a mildly slubbed yarn. This revisited and evolved proprietary 100% Cotton denim within the Iron Heart collection uses a heavy, twisted weft yarn to add structure and a vintage texture that softens quickly, resulting in a remarkably durable denim with a natural drape that retains its form through years of wear, with unmatched performance and comfort. Featuring a rope-dyed indigo warp and a natural-colored weft over a heavy white core yarn, these jeans will evolve into a bright vintage blue with warm, contrasting fade patterns. Finally, they're topped off with an ultra-heavy natural vegetable-tanned embossed leather patch, heavy-duty canvas twill pocket bags, embossed copper riveting on the front pockets, hidden rivets on the back, a button fly with interior selvedge detailing, and a chainstitched waist, seat, and hem. This garment will surely be a new classic, using signature IH details and fabric, with a contemporary yet informed mid-rise, straight-tapered fit for the gent who lives his history in the present. Built for the motorcycle community and over-engineered to start, Iron Heart tests the limits of what actually can be artfully woven and sewn. The Iron Heart 634S in 18 oz. Vintage Indigo has the supreme character to rival any in its weight class, yet it will knock out and ride over the competition with championed comfort and fading potential.
Specs
- Straight Tapered - 634 Fit
- Mid Rise, Roomy Seat, Broad Thigh, Tapered Leg w/ Wide Hem
- 18 oz. Japanese Low Tension Selvedge Denim - Shinya Mills
- Proprietary Fabric - Signature Denim
- Sanforized - Once Washed
- Red Selvedge Line
- Heavy Twisted Weft Yarn
- Indigo Dyed Warp & White Weft
- 100% Cotton
- Zinc Button Fly
- Heavy-duty Cotton Twill Pocket Bags
- Tucked Belt Loops
-
Embossed Copper & Concealed Rivets
- Embossed Natural Cowhide Leather Patch
- Chainstitched Waistband, Seat, Inseam & Hem
- Bartack Reinforced
- Made in Japan
Sizing
Model Measurements: 5'10" | 155 lbs. | 39" Chest | 32" Waist - Wearing Size 32
The 634S-18 runs true to Iron Heart sizing, and we suggest going down 0-1 size from your Actual Waist Measurement (Body/Belt). This piece is made with sanforized denim and has been once washed to remove most shrinkage. With regular use, one can expect up to 1” of stretch in the waist (Circumference) over the long term.
Our Method of measuring is different than Iron Heart’s and we recommend consulting our Sizing Guide when purchasing. We provide garment-specific measurements taken in-house, per Our Method, that are not duplicated across fabric or colorways and are re-measured each production run. Please feel free to Contact Us for additional assistance.
Iron Heart 634S-18 - Straight - 18oz Vintage Selvedge Indigo

Iron Heart 634S-18 - Straight - 18oz Vintage Selvedge Indigo
Specs
- Straight Tapered - 634 Fit
- Mid Rise, Roomy Seat, Broad Thigh, Tapered Leg w/ Wide Hem
- 18 oz. Japanese Low Tension Selvedge Denim - Shinya Mills
- Proprietary Fabric - Signature Denim
- Sanforized - Once Washed
- Red Selvedge Line
- Heavy Twisted Weft Yarn
- Indigo Dyed Warp & White Weft
- 100% Cotton
- Zinc Button Fly
- Heavy-duty Cotton Twill Pocket Bags
- Tucked Belt Loops
-
Embossed Copper & Concealed Rivets
- Embossed Natural Cowhide Leather Patch
- Chainstitched Waistband, Seat, Inseam & Hem
- Bartack Reinforced
- Made in Japan
Sizing
Model Measurements: 5'10" | 155 lbs. | 39" Chest | 32" Waist - Wearing Size 32
The 634S-18 runs true to Iron Heart sizing, and we suggest going down 0-1 size from your Actual Waist Measurement (Body/Belt). This piece is made with sanforized denim and has been once washed to remove most shrinkage. With regular use, one can expect up to 1” of stretch in the waist (Circumference) over the long term.
Our Method of measuring is different than Iron Heart’s and we recommend consulting our Sizing Guide when purchasing. We provide garment-specific measurements taken in-house, per Our Method, that are not duplicated across fabric or colorways and are re-measured each production run. Please feel free to Contact Us for additional assistance.
Collection: Iron Heart
After 20 years of working in the Japanese garment industry, Shinichi Haraki established Works Inc., a.k.a. Iron Heart, in 2003 as a heavyweight clothing brand initially geared toward Japan’s motorcycling community. Iron Heart creates classic and timeless clothing crafted out of the finest materials and achieves the highest standards by closely working with fabric development, garment manufacturing, and the brand’s cult community. Over the years, Iron Heart has become the definition of bullet-proof garment construction. Staying true to their slogan,...
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