Iron Heart
423-IVO - Work Overshirt - 13oz Ivory Oxford Cloth
423-IVO - Work Overshirt - 13oz Ivory Oxford Cloth
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Description
The Iron Heart IHSH-423-IVO Work Overshirt is a heavyweight, reinforced piece produced from a 13 oz. sanforized and washed Japanese Oxford Cloth that's an appropriate style staple for year-round use. Using a new Work Overshirt pattern, this piece is perfectly proportioned in length to be worn as a casual shirting or layering piece for modern, vintage-styled grit. A limited seasonal release and cult collectible from Iron Heart, this cotton oxford broadcloth is a plain box-weave using thick 2 x 2 yarns to replicate duck canvas cloths with more refinement, flexibility, and texture in a three-dimensional weave. This fabric features a structured drape that adapts to the body, while the ivory reactive-dyed yarns retain their color, even when worn as hard as intended. This Work Overshirt has numerous carefully considered construction and design details, such as the squared shoulder and back yoke panel with a square hem and split side seam for drape and mobility, complemented by brown concave military-grade melamine buttons on the front placket and dual patch front chest pockets, placket, and pleated cuffs to make a piece for the stylistically sound and self-reliant. Further, heavyweight bartacks, internal felled seams, and chainstitched construction throughout give this piece all the necessary heritage provenance and then some. The Ivory Oxford Work Overshirt strikes a balance between classic and modern applications, making it a future heirloom, a year-round go-to, and a new project piece that will only improve with wear. Built for the biker and over-engineered from the start, the Iron Heart 423-IVO tests the limits of what can be artfully woven and sewn, delivering a lifetime of durability in a workshop-to-street-ready design.
Specs
- Limited Edition
- Classic Fit
- 13 oz. Japanese Oxford Broadcloth
- Proprietary Fabric
- Sanforized - Once Washed
- Reactive Dyed
- 100% Cotton
- Point Collar
- Back Yoke Panel
- Straight Hem w/ Split Side Seam
- Buttoned Patch Chest Pockets w/ Pencil Slot
- Tonal Stitching
- Buttoned Pleated Cuffs
- Brown Melamine Concave Buttons
- Felled Seams
- Chainstitched Construction
- Bartack Reinforced
- Made in Japan
Sizing
Model Measurements: 5'10" | 175 lbs. | 40" Chest | 32" Waist - Wearing Size M
Iron Heart Shirting sizing is graded in small increments. The 423-IVO Overshirt has a relaxed cut, and to wear as an overshirt, take your typical Iron Heart size. For a more tailored fit, consider going one size down. This piece is made with a sanforized fabric and has been once washed to remove most shrinkage. With regular use, one can expect up to .25” of stretch in the chest (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 423-IVO - Work Overshirt - 13oz Ivory Oxford Cloth

Iron Heart 423-IVO - Work Overshirt - 13oz Ivory Oxford Cloth
Specs
- Limited Edition
- Classic Fit
- 13 oz. Japanese Oxford Broadcloth
- Proprietary Fabric
- Sanforized - Once Washed
- Reactive Dyed
- 100% Cotton
- Point Collar
- Back Yoke Panel
- Straight Hem w/ Split Side Seam
- Buttoned Patch Chest Pockets w/ Pencil Slot
- Tonal Stitching
- Buttoned Pleated Cuffs
- Brown Melamine Concave Buttons
- Felled Seams
- Chainstitched Construction
- Bartack Reinforced
- Made in Japan
Sizing
Model Measurements: 5'10" | 175 lbs. | 40" Chest | 32" Waist - Wearing Size M
Iron Heart Shirting sizing is graded in small increments. The 423-IVO Overshirt has a relaxed cut, and to wear as an overshirt, take your typical Iron Heart size. For a more tailored fit, consider going one size down. This piece is made with a sanforized fabric and has been once washed to remove most shrinkage. With regular use, one can expect up to .25” of stretch in the chest (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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