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Iron Heart 634S 19 Oz. Left Hand Twill – Just Released

Known for making some tough as nails denim, revered heavyweight specialist, Iron Heart, brings us the 634s 19 oz. Left Hand Twill denim. Contrasting their previous work, Iron Heart  incorporated a new type of denim for this jean which employs dark indigo dye, and a left hand twill.

This means that in appearance, you will be able to see that the yarn used to weave the fabric will tend to run a diagonal line from top left to bottom right in the jean. Due to this unique weaving method, the 634s will tend to possess a softer hand despite its heavy weight.

Iron Heart 634S 19 Oz. Left Hand Twill

The straight cut and heavy weight of the jeans will make it an ideal piece to have in your line up for the upcoming chillier months. The jeans also seem to have a slubby, hairy characteristic to them as well making for an interesting appearance. For more information on how slub differs to nep texture, be sure to check out our previous guide.


The denim used to make this jean is unsanforized. As a note to those worried about shrinkage, Iron Heart states that the jeans have been once washed to ensure that further shrinkage is minimal to none. The sizing to this specific pair also seems to be different due to the way that the denim behaves, thus the they also suggest that you refer to their size charts.



  • Name: Iron Heart 634S 19oz. Left Hand Twill Straight Cut Jeans
  • Weight: 19 oz.
  • Fit: Straight Cut
  • Denim: Left Hand Twill Super Dark Indigo Selvedge (unsanforized, once washed)
  • Other:
    • Red Selvedge Line
    • Lined Rear Pockets
    • Button Fly
    • Branded Waist Button and Rivets
    • Belt Loops Sewn Into Waistband
    • Over Gauge Constructional Stitching
    • Pocket Bag Detailing
  • Available at: Iron Heart for $400

IH 19 lefty



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