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ONI Denim [Workwear Series] 547DIZR "Dark Indigo Secret Denim" 20/40oz Double Knee Semi-Tight Straight Jeans


With this piece of the new Workwear Series, Oni has entered in the ultra-sturdy workwear world, adding triple chainstitching construction and reinforcements. This double knee version of the 547 is a beast. A second layer of fabric has been added as a reinforcement to cover the thighs and knees, reaching 40oz and creating the ultimate indestructible workwear pant. These rugged-looking pants look great welding pipes or laying bricks or any other laborious tasks but also on the street thanks to the semi-tight straight cut. The best-dressed dudes across the globe are finding style in everyday utilitarian staples. For any guy not sure where to start, allow us to suggest this stylish and functional classic.

The latest Secret Denim Dark Indigo fabric has a darker indigo warp and a lighter beige weft than the original secret denim. One of the most important types of denim in recent years has been Oni's Secret Denim. First launched in 2012, the Secret Denim has been one of the most desirable denim fabrics by Denim Heads around the world due to its unique texture and incredible softness and comfort. This new dark indigo version features a deep indigo colour. It is a bit rougher and more rigid than the standard secret denim, but it maintains all the standard version's slub and hair. If you are looking for faster and more contrasted fades and love the superb texture of the secret denim, there is no better option than this fabric. Only Oishi-San can produce this denim, and no one else can reproduce it. He uses extra-thick yarns of three different kinds of cotton woven at ultra-low tension on a vintage shuttle loom. The result is a beefier, extremely knotty unsanforized 20oz fabric with a fantastic slubby and hairy texture.

The warp yarn is dark indigo rope-dyed. The weft yarn is light beige dyed cotton. The fading potential is incredible and will showcase super fast and high contrasted fades.

The jeans are made with all the superior-quality ONI details such as copper buttons, high-quality pocket bags, heavy-duty bar tacks and a custom veg-tanned deerskin leather patch. Apart from the knee reinforcements and the triple chainstitching construction. mentioned above.

The cut is the ONI's 547 semi-tight straight, a silhouette that does not apply much taper to a neat fit.

*Please, keep in mind that, due to low tension, "Secret Denim" fabric will stretch quite a bit, so if your jeans are a tight fit at the start, don't worry because after just a few uses you will have gained the perfect fit.

The legend of ONI is alive to this day. In recent years Oishi-San has devoted himself to experimenting with widely varying grammages, rough textures, different indigo dyeing techniques and novelty cuts while always maintaining a very limited production and wielding his experience in denim which now goes back more than 60 years.

[Visit our LOOKBOOK and discover a great selection of heritage street-style outfits]

  • 20oz unsanforized indigo rope dyed Japanese selvedge denim. It is a one-wash version so expect no shrinkage
  • 100% cotton
  • Medium rise
  • Semi-tight straight
  • 40oz double knee reinforcement
  • Triple chainstitched construction
  • Ultra-sturdy
  • Heavy-duty red bar tacks
  • Warp: dark indigo / Weft: light beige
  • Slubby, rough and hairy texture
  • Ultra low-tension woven
  • Selvedge line colour: red
  • ONI custom copper doughnut buttons and hardware
  • Hidden rivet pockets
  • Peek-a-boo selvedge coin pocket
  • Durable cotton-lined fabric in front pockets
  • Raised belt loops
  • Custom vegetable tanned deerskin leather patch with ONI logo
  • Super limited quantities
  • Made in Japan


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If for some reason you are not happy with your purchase you can return it to us within 14 days for a free size exchange or refund.

For more info please visit our returns or size exchange pages.