The ONI Denim 270-OLD18 “Olive Denim” 18oz Neat Straight Jeans offer a refined interpretation of ONI’s signature fabric, combining their iconic low-tension texture with a versatile, modern straight silhouette. Woven on vintage power looms, this 18oz selvedge denim features olive-dyed warp yarns and an off-white weft, creating a rich, earthy tone with subtle depth.

True to ONI’s identity, the fabric displays a highly irregular, slubby surface with a dry, rugged hand feel. Over time, the denim softens and evolves, with the sulfur-dyed olive warp developing a muted, nuanced fade—very different from traditional indigo. Instead of high contrast, the aging reveals layered tonal variation, giving the fabric a more understated and sophisticated character.

The 270 “Neat Straight” fit is ONI’s take on a perfectly balanced straight silhouette. Designed with a medium to mid-high rise and a clean, regular top block, it offers comfort without excess volume. The leg remains straight overall but features a subtle taper from the knee down, resulting in a sharp, streamlined profile that works effortlessly across styles—neither too wide nor too slim.

Construction stays true to ONI’s high standards. The jeans are finished with original donut buttons, copper punched rivets, and hidden back pocket rivets for durability. A horse-tanned leather patch with green foil embossing, applied after washing, preserves its crisp appearance while complementing the olive tone of the fabric. Signature pocket stitching and the original flasher complete a pair that embodies ONI’s fabric-driven approach—where texture, tone, and aging define the experience.

Fit Notes: This model fits true to size for ONI, meaning the tagged size closely matches the actual waist measurement. Compared to most global American brands, sizing is similar or slightly smaller, so you may take the same size or one size up. As always, we strongly recommend checking our size chart to find your perfect size. The denim is unsanforized but has been one-washed, so no shrinkage is expected. Thanks to ONI’s signature ultra–low tension weave, the fabric will stretch significantly in the waist—typically up to 1–1.5 inches with regular wear. That said, we don’t recommend sizing down aggressively, as it may compromise both comfort and the intended fit. As always, we strongly recommend checking our size chart to ensure the best possible fit.

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

• 18oz unsanforized Japanese olive selvedge denim. It is a one-wash version so expect no shrinkage
• 100% cotton
• High rise
• Neat straight
• Heavy-duty bar tacks
• Warp: olive indigo / Weft: white
• Slubby fabric
• Ultra low-tension weave applied on the shuttle loom
• Selvedge line colour: olive
• 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 cowhide leather patch
• Super limited quantities
• Made in Japan

Spain

FREE SHIPPING on orders over 100 EUR .

6 EUR shipping cost on orders under the value mentioned above.

European Union & The UK

FREE SHIPPING on orders over 150 EUR \\.

14 EUR shipping cost on orders under the value mentioned above.

Rest of the World

FREE SHIPPING on orders over 250 EUR .

25 EUR shipping cost on orders under the value mentioned above.

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

For more info please visit our returns & exchange page.

Please note that items in the SALE category are considered FINAL SALE, with no returns or exchanges accepted.