Blurring the line between rugged utility and refined everyday wear, this 14oz Heavy Oxford Coverall from ONI is a true workwear icon reimagined. Crafted in Japan and designed by the legendary Oishi-san, it captures the soul of vintage American workwear through a distinctly Japanese lens, offering durability, functionality, and subtle sophistication in equal measure.

At the heart of this piece lies its heavyweight Oxford fabric—a dense 14oz cloth woven in a 2x2 basket weave. Unlike typical shirting oxfords, this fabric is thick, tactile, and built for years of wear. So demanding is its construction that ONI had to step beyond traditional selvedge looms, employing specially calibrated machines to handle the chunky, twin yarns. The result is a texture that’s visually rich and structurally impressive—workwear at its most evolved.

The yarn-dyed olive-beige tone, developed through a meticulous sulfur dye process, brings depth and character to the garment. By dyeing the yarns before weaving—an old-school, labor-intensive method—ONI achieves a uniquely layered hue that shifts subtly with light. With wear and wash, it will fade into a soft vintage olive, developing distinctive, personal patina over time.

Thanks to its low-tension weave and Tempi (one-wash) treatment, the fabric feels surprisingly soft and broken-in right out of the box, making it an ideal transitional jacket for fall and beyond.

Designed with purpose, the coverall features four practical pockets—two lower handwarmers, one exterior chest pocket, and one interior breast pocket—offering modern functionality without sacrificing style. Copper buttons and rivets round out the garment with ONI's signature premium details.

Whether layered over a tee or a hoodie, this piece brings updated workwear versatility to your wardrobe with unmistakable Japanese craftsmanship.

Fit Notes: Despite being a Japanese jacket, like most ONI garments, we find the sizing of this coverall to be more Western than Japanese. If you usually wear a size M in American jackets, you'll find a suitable fit with this jacket in size 40 (M). However, as always, we recommend consulting our size chart for the perfect fit. It is unsanforized but bio-washed, so there will be no shrinkage.

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• 14oz Heavyweight Japanese Oxford fabric. One-washed, so no shrinkage expected
• 100% cotton
• Sulfur-dyed
• One inner and one outer breast pocket
• Two handwarmer pockets
• ONI custom black copper donut buttons
• Cotton woven patch with ONI logo
• 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 free 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.