Every pair of authentic Nike shoes comes with an SKU number that is identical to the SKU number on their box. If the numbers are missing or do not match, they are likely fakes. Check the tongue label. Often, fake Nike manufacturers put outdated sizing labels on the inside of the shoe.

Our Verdict. The Nike Zoom Pegasus 39 is both stiff and responsive compared to other running shoes that we tested, leading to a very supportive feel and a performance-oriented platform. The upper contributes to performance by being snug in the midfoot while narrowing in the toe-box to provide a locked-in feel.

You'll experience them all with Nike Zoom, our innovative and explosive cushioning system designed for speed and agility. The technology uses pressurized air and tightly stretched fibers to absorb impact and then snap back for fast movement and reduced stress on muscles, joints, and tendons.

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.