I have a pair of original Crocs Kayman, and a pair of Airwalk knock-offs.

Both are conmfortable, light and can be sanitized.

The only difference I can see, is that the Airwalk cost about $12, as compared with Crocs $30.

I am sure there are aother differences, but i have yet to detect any.

(yes, I know Crocs are made of Croslite resin etc.etc.. I am talking about noticeable differences).