what's this???

So, after 8 years with my trusty Nike running shoes, I decided it was time to go out and buy new shoes. If this fact hasn't tipped you off to the hard truth of my complete lack of regular exercise, let me be blunt...I rarely exercise. However, it is time to change things and so my first step is getting new shoes...easier said than done. The sports shoe walls at the local mall were covered in these:

What in the world? I suddenly felt very old standing in front of one of those walls...