Minimum. Love it. So thin and light that it fits in every pocket. The tri-fold US dollar fits in the same place as a credit card, making it easy to carry some cash for emergencies. It's waterproof enough to prevent the contents from getting wet when playing outdoors or by the lake, although the edges are obviously not waterproof! The corners are a bit worn but the tyvek is still strong. Let's just say he developed his character a bit. No problems with the input and output of cards. If you filled it with the maximum number of thick cards, you might disagree. I usually only carry 5 cards and 4 bills.
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