I'm sure you've already resolved this issue, but for anyone else wondering, check the MK price tag attached on the bags and it'll say what material it is made from. If it is leather it will say Genuine Leather or Leather, if it is PVC it will say so. My Signature Vanilla Hamilton says PVC (that is what all signature MK bags are made of from what I know) and all my other Hamiltons (saffiano & pebbled) say genuine leather on the tag