The Deluxeware S101-00 Flat Seam Plain Sweatshirt is a fully Japanese-made sweatshirt developed as a modern evolution of classic American athletic wear from the mid-20th century. Drawing inspiration from sweatshirts that emerged between the 1930s and 1950s, Deluxeware focuses not only on visual authenticity, but on the functional qualities, fabric integrity, and construction methods that defined the originals.

At the core of this sweatshirt is an exceptionally dense 20oz loopwheel fleece, knit on vintage tsuri-ami (吊編機) circular knitting machines in Wakayama Prefecture. These machines operate at extremely low speeds, relying on gravity rather than tension, allowing the fabric to be knit at its maximum density without internal stress. The result is a sweatshirt fabric with a dry, firm hand feel, outstanding heat retention, and remarkable durability. The interior is brushed for warmth, creating a balance of rugged exterior texture and comfortable insulation.

The sewing is carried out in Odate, Akita Prefecture, using original 1950s Union Special flat seamer machines. This flat seam construction minimizes bulk, improves comfort against the skin, and significantly increases seam strength — one of the defining characteristics of true vintage athletic garments.

Featuring a classic set-in sleeve design and a plain, no-nonsense silhouette, the S101-00 represents Deluxeware's philosophy of refining a standard rather than reinventing it. The brand refers to this series as its "Emotional Standard" — a garment that delivers lasting satisfaction through material quality, craftsmanship, and long-term wear rather than trend-driven design.

Fit Notes: This sweatshirt runs small. Deluxeware tends to run smaller than standard American sizing, so we recommend sizing up one from your usual size for a comfortable fit. Deluxeware also offers USM and USL sizes, which are larger than XL and feature a more regular, less tailored cut. As a reference, we strongly recommend checking our size chart and comparing it with your best-fitting sweatshirt to ensure the right fit.

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

‎• 100% cotton sweatshirt
‎• Ultra-heavyweight 20oz loopwheel fleece
‎• Knit on vintage tsuri-ami machines in Wakayama
‎• Brushed interior for superior warmth
‎• Dry, firm hand feel with excellent insulation
‎• Flat seam construction on 1950s Union Special machines
‎• Set-in sleeve design
‎• Sewn in Odate, Akita
‎• Made in Japan

Spain

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European Union & The UK

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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 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.