Antique Lux Nero (black brushed/antique) calf leather, fully back zipped leather boots. I believe the lining is either silk or satin. Classic lines and versatile for all seasons Super luxurious and soft, I choose to keep them supported with boot shapers but you can store them flat. 18" high 2" heel 13" widest around the calves. These are very well made but fine leather boots, so gently zip, not tug. Just to note if you're very athletic or like me (ballet trained for 12 years) they are fairly snug in the calves which is why I included the measurement. I've taken good care of them, but also want to note there are a couple small scuff marks on each heel (pictured) and small creases in the toe area because of the super fine leather.