288ZR-BKBK Secret Black 20oz Selvedge Denim
ONI Denim's jeans release enters Vinchy's AI lab for a closer look at fabrication, fit, and care notes.
Tagged at $295, quality lands at 90/100, comfort at 60/100, and sustainability at Not Available for discerning shoppers.
- Brand · ONI Denim
- Category · Jeans
AI scorecard
What matters most for shoppers researching this piece right now.
Craftsmanship, stitching, and long-term durability.
Movement, breathability, and day-long wear.
Environmental impact and responsible sourcing.
Attribute deep dive
We break down what drove each score so you can weigh trade-offs.
Quality Analysis 90/100
This denim is built for the long haul, featuring an extremely heavy 20oz selvedge denim fabric and robust construction details like back pocket rivets and custom engraved hardware, ensuring exceptional resistance to wear and tear. The use of thick yarn further contributes to the garment's impressive structural integrity.
Comfort Assessment 60/100
The comfort score is low because this garment is made from 20oz heavyweight denim, which is inherently rigid and lacks any mention of stretch or elastane for ease of movement.
Sustainability Impact Not Available
This garment provides no specific sustainability indicators, such as certified organic materials or ethical production claims, making it impossible to assess its environmental or social impact.
Measurement breakdown
Measurements across available sizes.
| Size | Waist | Thigh | Knee | Leg Opening | Inseam | Rise |
|---|---|---|---|---|---|---|
| 29 | 75.6 cm | 57.9 cm | 21.8 cm | 19.3 cm | 87.6 cm | 28.8 cm |
| 31 | ||||||
| 38 | ||||||
| 32 | ||||||
| 30 | ||||||
| 36 | ||||||
| 33 | ||||||
| 34 | ||||||
Gallery
Reference shots help you validate textures, hardware, and proportion before you buy.






Garment details
Need-to-know info pulled from the retailer’s description, sizing notes, and care callouts.
ONI's coveted Secret Denim is the 20oz denim that earned the small Japanese label a cult following. A truly unparalleled fabric, the denim sports a unique color and intensely textured feel, and is crafted using extra thick yarn. This installment features and all-black rope dye on both the warp and weft which will fade over time to grey. The denim has been given a one-wash tempi treatment to eliminate shrinkage, leaving them ready to be worn right away, no soaking required.
20oz unsanforized selvedge denim fabric One-wash with tempi treatment to remove shrinkage ONI's Classic Straight fit has a high rise with relaxed top block and is roomy throughout the legs Rope dyed black warp and weft Custom engraved buttons and hardware Back pocket rivets Raised belt loops Hidden coin pocket selvedge Custom vegetable tanned leather patch Red & white selvedge 100% cotton Made in Japan