Samurai doesn’t just make T-shirts—they forge them. The SJST-TW01 is their heaviest tee to date, weighing in at a formidable 15.7oz, and it’s unlike anything else in the world of knitwear. Crafted in Japan from #10 air-spun yarns, this tee blurs the line between heavyweight jersey and lightweight sweatshirt—dense, rugged, and ready for a lifetime of wear.

What makes this fabric so special? Samurai uses a rare open-ended spinning technique, twisting thick, short-staple cotton fibers using only air. The result is a yarn that’s naturally slubby, irregular, and rich in texture. By doubling the yarns—essentially creating a #5 weight—the fabric gains incredible heft without sacrificing breathability. This is cotton with character: dry to the touch, with a bold structure that softens and molds to your body over time.

The #10 yarn, already considered very thick for jersey fabric, is further twisted into a double yarn—effectively creating the equivalent of #5 yarn. This ultra-sturdy jersey is knitted with threads strong enough to be used in heavy denim. The result is a fabric that’s rugged, textured, and built to last. The classic fit is boxy and balanced—roomy without being sloppy—and it's finished with a reinforced two-needle binder neck designed to maintain its shape through years of wear.

But the fabric alone isn’t the full story—Samurai has also perfected a layered dyeing technique. This creates a rich, dimensional tone that shifts subtly depending on the light and angle, and continues to evolve with wear. 

Fit Notes: All Samurai tees run smaller than standard American sizes. If you typically wear a size M in American t-shirts, you'll likely need a size L in this one. However, fit may vary based on body type, so we recommend checking our size chart for the best fit. We stock the Large (Overseas version), which is 3cm longer than the Japanese version.

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

• 100% cotton, 15.7oz extra heavyweight jersey
• #10 air-spun yarns (open-ended spun)
• Slubby, textured fabric with a dry handfeel
• Double-needle stitched collar
• Regular fit, slightly boxy silhouette
• Pre-washed to minimize shrinkage
• Layered dyeing technique
• Made 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.