The product is named "Protect Your Pumps" which is essentially a clear adhesive you stick onto the soles of your shoes. It acts as a buffer between the bottom of the shoe and the ground, protecting it from dirt, grime, scratches and scrapes. Unlike other types of sole protection, you can easily remove the clear piece of plastic and the soles will still be in pristine condition.
They come in two styles - heels and flats. Here's a photo of how it looks on the soles of my Repetto flats (which I got for a steal!).
If you spent a fortune on the shoes, you want them to wear them for a long time no? Find out more at the website.