The majority of leather manufacturing has long gone overseas for a number of reason including labor costs and environmental regulations. The handful of major American tanneries that are left has learned to deal with these issues because they have been consistently producing a high-quality product. They are based out of Chicago and the tannery that I use to make my simple vegetable tanned leather wallets.
The bi-fold is great if you just carry bills inside. It is simple, not too bulky and the leather has a great pull up and ages beautifully.
These are great for a few credit cards and even some rolled up bills.