My 2nd purchase. Even Kevlar doesnt last forever. I could have kept using my old one, but it was getting frayed in one corner. Until they come up with a Graphene* billfold - I don't think you will find a tougher, thinner billfold on the market. (*For those of you who don't know: A sheet of Graphene, is at present, only a theoretical possibility. Graphene can be only one atom thick. Or so the scientists say.)