This never fails, the fake pairs tend to always have flimsy and very short tongues. Check the picture above: the real pair has a very sturdy tongue while the fake pair has a shorter tongue that appears tacky and deformed. Moreover the lining around the ankle looks totally different (check the yellow rectangle).

The heel tab on the fake pair has a steeper angle while the tab on the authentic pair has more of an obtuse angle (flatter, and if you close enough the tab actually extends a little bit further on the authentic pair). The yellow circle also shows you how the back is steeper and sturdy on the real pair and much shorter on the fakes and uneven.

The red arrows shows you how the midsole on the real pair has foggy shade (but you can see the white boost technology through it). On the other hand, the fake pair has a very dark shade (and the white boost tech is barely noticeable).

You can see how different the color tone is on the outsole; moreover the fake pair seems to have a wider base; if you look at the red line, it looks as if the toe box is literally flat on the fake pair. Yellow circle is there to show you how basically nonexistent the tongue is on the fake pair (you can barely see the tongue of the fake pair).

Fake box and label; the things to check here are usually the upc code and the font of the letters/numbers and the box color. (Author’s note: As soon as official pictures of the authentic box pop up make sure to do a side by side comparison for your convenience.)