I have been wearing this exact same shoe for almost thirty years now and it's one of my favorite tennis shoes for comfort, style and versatility.  I say this so that when I tell you that I believe these are knock-offs you will understand that I know what these shoes should look and feel like.  Here are some things that made me suspicious: The sizing was all wrong.  I have worn the exact same size of this brand/style for as long as I can remember (I don't even have to try them on in the store to know that they will fit) and these were both too narrow and too short.  There was bonding or imprinting on areas of the shoe that should have been stitched. The K-Swiss logos found on various parts of the shoe were not consistent with any other pair of this brand/style that I have owned in size, shape, placement or material .  The materials used to construct the interior of the shoe were inconsistent with and of lower quality than other shoes of this brand/style I have owned.

Let me be clear, in every instance I am comparing these to other K-Swiss Men's Classic sneakers I have owned over the last 30 years.  I am not comparing them to similar shoes of another brand or even a different style of K-Swiss sneakers.  These are the exact same shoes I have worn for years.  After I returned these I went to a local shoe store and bought another pair.  I compared the pair bought at the local store to the old pair that I was replacing and they were exactly the same in all respects, so I can't even attribute the differences in the ones I purchased on Amazon to a design change or something of that sort.

I am giving this product 2 stars, because if you don't mind wearing an item that is possibly a counterfeit then these are of reasonable quality for a tennis shoe in this price range, although I don't feel they are of the same quality as the K-Swiss shoes I m used to due to the stitching and materials issues I mentioned.  To the casual observer they look like K-Swiss tennis shoes so if you can't tell neither can anyone else.  I'm not sure how comfortable they are, because I couldn't even get my foot in them due to the sizing irregularity.

These are just my observations and opinions, your experience may vary.