This micro sleeve wallet by Bellroy is your ideal companion for your bank cards. There’s a slot on the front and back for your most frequently accessed cards, and a pull-tab to get to the rest. Made from premium vegetable tanned cow leather. Holds 6+ cards.
If you’re only carrying around cards 90% of the time, it makes a lot of sense to keep your wallet bulk to a bare minimum. If for nothing else but your back’s sake. Don’t become Costanza.