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About us


was established in 1947 by Marc S. Tartaglia and Robert Rossetti as a custom outdoor sign and lettering company. Back then it was known as Red Diamond Company, named after the US Third Army (11th Regiment) 5th Infantry Division in which Marc proudly served under General Patton in World War II. As the company grew the need for mass production of signs and lettering became apparent and Red Diamond was among the first to introduce silk screen printing for the production of multiple signs, banners, etc.

Early in 1955, the company diversified into screen printing, embroidery and tackle-twill on garments and textiles and soon began doing all the custom lettering for Russell Athletic on the East coast, as well as supplying to sporting goods stores and advertising specialty firms nationwide. In 1966,

the company moved to its current location in Belleville, New Jersey and opened a factory outlet which sold directly to the public called NATIONAL SPORT SALES. A few years later a newly-renovated showroom was opened and the company changed its name to NATIONAL SPORTSWEAR to reflect the wide and exclusive range of custom printed active wear and embroidered garments it offered.


Today, NATIONAL SPORTSWEAR sells and decorates uniforms for all major sports as well as recreational activewear for schools, teams and clubs, work uniforms for all businesses, and custom garments for any and every event including corporate venues, family reunions, parties, bar & bat mitzvahs…you name it!

As always, National Sportswear is a full-service, direct factory-to-your company. From design concept to completion we do nearly all our own work in-house with no middleman. So you can be certain that all items will be done to your exact specifications, at the best price, and on-time, every time. Our 70-year legacy ensures you will receive excellent quality and value.



  • Introduce the concept of “Stock Designs” for screen printing and embroidery in 1950.

  • Use Stretch Plastisol on worn garments under the name “Rub-R-Core” in 1955.

  • Use Infrared Ovens to cure plastisol in 1955.

  • “In House” embroidery and artwork computer-aided design and digitizing in 1980.

  • Color laser printing transfers 1993.

From 1947 to today, National Sportswear has been a family owned business dedicated to QUALITY & SERVICE and VALUE. We are now serving our third generation customers. You don’t stay in business for all those years without a good reason, so go with a name you can trust and try us on your next order.


Come see us at our factory showroom for unparalleled personal service.
Thank you!

Marc Jr. and Mike

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