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Iron Heart 666S - Slim Straight - 16oz Vintage Indigo
Iron Heart 666S - Slim Straight - 16oz Vintage Indigo
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Iron Heart

666S - Slim Straight - 16oz Vintage Indigo

$320.00 $240.00

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Garment Measurements | Virtual Size Chart


The Iron Heart 666S in Vintage Indigo is a traditional remake in a medium rise Slim Straight Fit with a moderate seat and thigh, a slightly tapered leg, and moderate hem. This jean features a medium weight, 16 oz. sanforized and once-washed right hand twill Japanese Selvedge denim made with a thick yarn, but at low tension to give the feel of heavier denim but in an all-season weight. A softer and more flexible pick from the Iron Heart collection, this fabric is made from 100% cotton with subtle weave irregularity, produced on a vintage shuttle loom by the famed low tension specialist Shinya Mills in Okayama, Japan. Featuring an indigo dyed warp and a natural colored weft with a subtle green cast, the jeans have a set-in dye that will fade slowly but deeply in a vertical vintage style. Finally, it's topped with an ultra heavy natural vegetable tanned 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 is comfortably slim with a straight form and a rustic appeal, perfect for the gent who lives his history in the present. Built for the motorcycle community and over-engineered to start, it tests the limits of what actually can be artfully woven and sewn. The Iron Heart 666S in 16 oz. Natural Indigo has enough character to rival its wearer, yet will tastefully fade with a considerable amount of off-road adventure.


  • Slim Straight - 666 Fit 
  • Mid Rise, Slimmed Straight
  • Moderate Seat and Thigh, Slightly Tapered Leg w/ Moderate Hem
  • 16oz. Japanese Low Tension Selvedge Denim - Shinya Mills
  • Sanforized - One Wash
  • Red Selvedge Line
  • Indigo Warp / Natural Weft
  • 100% Cotton
  • Zinc Button Fly w/ Selvedge Detail
  • Engraved Copper and Hidden Rivets
  • Heavy Duty Canvas Twill Pocket Bags
  • Fully Lined Back Pockets
  • Painted 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 33

Iron Heart 666S Denim runs slightly small and we suggest sizing to your actual waist size since this denim is sanforized and once-washed and is considered pre-shrunk. Expect 1" of stretch in the waist with regular use, and shrinkage to original size upon washing.

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