A modern reinterpretation of a WWII military classic, the Iron Heart IHM-48 takes the iconic N1 deck jacket silhouette and refines it into a lightweight, highly wearable everyday outer layer.
Constructed from 12oz Japanese whipcord—often referred to as “jungle cloth”—this version uses sulphur-dyed yarns that will gradually fade with wear, developing a rich, vintage patina unique to the owner. Unlike Iron Heart’s traditional heavyweight N1 models, the IHM-48 replaces wool insulation with a breathable, water-resistant Ventile cotton lining, making it ideal for transitional weather and layering.
The result is a rugged yet versatile jacket that bridges the gap between shirt and outerwear—perfect for daily wear across seasons.
Features
Size L
12oz Japanese whipcord (100% cotton)
Sulphur-dyed fabric designed to fade over time
Lightweight 6.2oz Ventile cotton lining (water-resistant & breathable)
Corduroy-lined collar, cuffs, and pocket trim
Two-way YKK zipper with snap storm flap
D-pocket hand warmers with snap closure
Interior “gun” pocket
Buttoned waist adjusters + paracord hem
One-washed (minimal shrinkage expected)
Made in Japan
Fit Notes
Regular fit, slightly trimmer and lighter than traditional N1 jackets
Designed for layering over shirts or light knits
True to size for a classic outerwear fit
A modern reinterpretation of a WWII military classic, the Iron Heart IHM-48 takes the iconic N1 deck jacket silhouette and refines it into a lightweight, highly wearable everyday outer layer.
Constructed from 12oz Japanese whipcord—often referred to as “jungle cloth”—this version uses sulphur-dyed yarns that will gradually fade with wear, developing a rich, vintage patina unique to the owner. Unlike Iron Heart’s traditional heavyweight N1 models, the IHM-48 replaces wool insulation with a breathable, water-resistant Ventile cotton lining, making it ideal for transitional weather and layering.
The result is a rugged yet versatile jacket that bridges the gap between shirt and outerwear—perfect for daily wear across seasons.
Features
Size L
12oz Japanese whipcord (100% cotton)
Sulphur-dyed fabric designed to fade over time
Lightweight 6.2oz Ventile cotton lining (water-resistant & breathable)
Corduroy-lined collar, cuffs, and pocket trim
Two-way YKK zipper with snap storm flap
D-pocket hand warmers with snap closure
Interior “gun” pocket
Buttoned waist adjusters + paracord hem
One-washed (minimal shrinkage expected)
Made in Japan
Fit Notes
Regular fit, slightly trimmer and lighter than traditional N1 jackets
Designed for layering over shirts or light knits
True to size for a classic outerwear fit
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