I like the maxpedition micro wallet - Maxpedition Micro Wallet 0218

Of course it depends on what your requirements are, but for a durable, minimalist wallet, I haven't seen any better. Leather absorbs moisture and eventually falls apart. This wallet being water-resistant and heavy-duty nylon should last for many years. Just make sure you don't stuff too much into the pockets and stretch it out. The pockets are tight as they should be, but especially the outside one might not hold what you put in if it's been loosened up. I really like my wallet and am completely satisfied.
Pros: Durable, Streamlined, Water-resistant
Cons: None

This review was written in the old system and had content requirements that are different than reviews written today.