These are thick and robust, and still unfinished on one side. Beautiful. As I drink from a glass glass and the ice melting condensation is a problem, I flip my coasters over rough side up, and they work like a charm. Better than any other coasters I have ever tried. I’ve purchased other leather coasters only to find they’re cork-backed on the bottom, or too thin to stay put when I raise my glass. These coasters are the real deal. All others are only pointless decorations.