On fake Dunks, the registered trademark logo on the insole is thick and bolded, with the “R” touching the surrounding circle. Real dunks have a thin registered trademark logo, and the “R” does not touch the surrounding circle at all.

Locate the tag inside your shoe. All authentic Nike shoes have a tag sewn into them with their size, barcode and model number on it. You will recognize it most easily by the barcode. Look for it inside: The tongue.

In conclusion, there's no single reason why Nike Dunks always sell out — it's a combination of factors that has made these shoes so beloved. From nostalgia and versatility to limited-edition releases and social media hype, the demand for Nike Dunks is driven by a range of factors that continue to fuel their popularity.

Originally named the College Color High, the Nike Dunk was made for the basketball court. With a similar look to the Jordan 1, the Nike Dunk launched in several collegiate colorways, including Syracuse, Georgetown, and Kentucky as part of a “Be True to Your School” marketing campaign.