I've got both a Saint Laurent card holder and Chanel card case. I've seen a bit of leather peeling on Saint Laurent one on the inside where you slip the cards in and out (could which has made me use it only on special occasions as I don't want to ruin it further, so I find myself using my Chanel card case the most. I use my Chanel almost daily (bought 9 months ago) and have no signs of wear so far