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Iron Heart 777-UHR - Super Slim Tapered - 21/23oz Indigo
Iron Heart 777-UHR - Super Slim Tapered - 21/23oz Indigo
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Iron Heart

777-UHR - Super Slim Tapered - 21/23oz Indigo


Garment Measurements | Virtual Size Chart


The Iron Heart 777-UHR is a beastly pair of jeans cut in a medium rise Super Slim Tapered Fit with a moderate seat and thigh with a strongly tapered leg and narrow hem. Rising from selvedge denim lore for its North American debut, this ultra heavy 21 oz. unsanforized right hand twill Japanese Selvedge denim actually increases in weight and density once exposed to water during wash/soak. Produced on a vintage shuttle loom in Kojima, Japan, the fabric features a rope dyed indigo warp and white weft in a slight slub weave. These details yield a beautiful patina over time when paired with a competent contender. The jeans are topped off with an ultra heavy natural vegetable tanned leather patch, heavy duty canvas twill pocket backs, 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. A prized possession for any heritage enthusiast, this garment touts one-step-further construction, near indestructible fabric development, and a comfortably modern fit. Built for the biker and over-engineered to start, this denim tests the limits of what can actually be artfully woven and sewn. The Iron Heart 777-UHR is masterwork of durability, and a craft colossus that is yours to tame.


  • Super Slim Tapered - 777 Fit 
  • Mid Rise, Slim
  • Moderate Seat and Thigh, Tapered Leg w/ Narrow Hem
  • 21oz. Japanese Ultra Heavy Loomstate Denim
  • 23oz. When Washed/Soaked
  • Unsanforized - Raw Unwashed
  • Red Selvedge Line
  • Indigo Rope Dyed Warp/White Weft
  • 100% Cotton
  • Zinc Button Fly w/ Selvedge Detail
  • Engraved Copper and Hidden Rivets
  • Heavy Duty Canvas Twill Pocket Bags
  • Fully Lined Back Pockets
  • Embossed Natural Leather Patch
  • Chainstitched Waistband, Yoke, Seat & Hem
  • Bartack Reinforced
  • Rolled & Tucked Belt Loops
  • Made in Japan


Model Measurements: 5'11" | 165 lbs. | 40" Chest | 32.5" Waist - Wearing Size 32

Iron Heart Denim runs slightly large, and we suggest sizing down roughly 1-2 sizes from your actual waist size. This denim is unsanforized and unwashed and will stretch 1" in the waist with one month of regular use, and shrink 1.5-2" upon first wash, and 2.5-3" in the length. Generally, we recommend sizing up one size for cold soak/rinse before wearing.

We recommend consulting our Sizing Guide and using our Virtual Size Chart.

Please feel free to Contact Us for additional assistance.

About Iron Heart

After 20 years of working in the garment industry in Japan, Shinichi Haraki established Works Inc a.k.a. Iron Heart in 2003 as a heavyweight Japanese clothing brand, initially aimed at the Japanese motorcycling community. Over the years and in partnership with the UK heritage community, the brand has become the pinnacle definition of bullet-proof garment construction. Originally made for bikers, Iron Heart pushes the design and construction of the clothing to the limit of what can actually be woven and... View All Iron Heart Products