Counterfeit football shirts have been a problem for as long as there has been a market for them. Nike kits are among the most faked in the world, with replica markets producing copies that range from obviously wrong to convincingly close. If you buy second-hand, collect vintage shirts, or pick up kits from resellers, knowing how to check authenticity is worth your time.

This guide covers the key things to look at, starting with the fastest and most reliable check available: the product code.

Start with the product code

Every authentic Nike football shirt carries a product code on the inner jock tag, the small label stitched to the lower hem on the left side of the shirt, and on the main care/wash label inside the collar or side seam. This code is the most direct route to verifying a shirt.

Kitcod.es is the best tool for this. It maintains a database of over 18,000 verified kits and cross-references product codes against that database. Enter the code from your shirt's tag, select the brand, and the site tells you whether it matches a known authentic shirt. It draws from verified references, historical records, and community submissions from collectors and retailers.

A matching code is a strong indicator of authenticity. It does not guarantee it, a counterfeit could theoretically copy a real code, but it is the fastest filter and will catch most fakes immediately.

Read the labels

After the code check, work through the labels carefully.

The jock tag (lower hem, left side) should have clean printing, correct font weight, and the product code in a consistent typeface. Fakes often get the layout wrong, use the wrong font, or smudge the print.

The care label inside the collar or side seam should list the fabric composition, country of manufacture, and care symbols in the correct order. Authentic Nike shirts are produced in countries including Cambodia, Vietnam, Thailand, Indonesia, and Jordan. The symbols and text should be sharp and legible, not blurry or poorly aligned.

The Dri-FIT or Dri-FIT ADV label appears on modern Nike match shirts. The specific technology used matches the template: Vaporknit shirts carry Dri-FIT ADV, while standard replica shirts carry plain Dri-FIT. A shirt claiming to be a player-issue Vaporknit but carrying a Dri-FIT label is misrepresented.

Feel the fabric

Authentic Nike match shirts use performance fabrics that are noticeably lightweight and have a specific texture. Counterfeits are often heavier, feel more synthetic or plasticky, and lack the fine mesh structure of the real fabric. Hold the shirt up to a light source: genuine performance mesh has a very regular, open weave. A denser or irregular weave is a warning sign.

Older Nike shirts from the late 1990s and 2000s used woven polyester that has a slightly heavier hand but still feels clean and precise. Fakes from that era tend to feel rough or cheap at the seams.

Check the crest and printing

The club crest on a genuine shirt is either embroidered or heat-transferred, depending on the specific shirt and era. Either way, the finish should be clean, with no loose threads, no bubbling at the edges, and accurate colours.

For embroidered crests, count the stitch density. Genuine crests are tight and detailed. Fakes tend to be thinner, with less detail and visible gaps in the embroidery.

For heat-transferred or printed sponsor logos, check that the edges are sharp with no ghosting or lifting. The sponsor font is a consistent tell: manufacturers reproduce official fonts to exacting standards, and even small differences in weight, spacing, or character shape point to a counterfeit.

The swoosh

The Nike swoosh on match shirts is usually embroidered or heat-pressed. It should sit flat against the fabric, have clean edges, and match the exact proportions of the Nike mark. Fakes often produce a swoosh that is slightly too wide, too narrow, or uneven at the tail. On shirts with an embroidered swoosh, check that the stitching is dense and smooth rather than raised and lumpy.

Quick reference

  • Product code check: kitcod.es
  • Jock tag and care label: correct font, layout, country of manufacture
  • Fabric: lightweight, fine mesh, not heavy or plasticky
  • Crest: tight embroidery or clean heat transfer, accurate colours
  • Sponsor: correct font, sharp edges, no ghosting
  • Swoosh: flat, clean edges, correct proportions