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I like this one, had it for few years and still looks good.
I use this one http://www.amazon.com/gp/product/B00DBBHP8K?psc=1&redirect=true&ref_=oh_aui_search_detailpage, as it is super lightweight and environmentally friendly had it over a year and it is the best wallet I ever had.
This is the one I carry:
http://www.ebay.com/itm/251764139748
It has 7 external card slots, two hidden card slots, ID slot, and two slots for bills. Very slim, very well constructed, and excellent quality. It's also screaming dirt cheap. Joseph Abboud wallets are the best deal on the market. I have several of them, including another - also slim - that has slots for 12 cards. It was $19.
i was using a coach double billfold, wasn't too thick, but it kept bending my cards. I have been using a Bosca wallet now and no problems. They have a ton of different styles, good stuff.
I like anything from Bellroy. I carry the card sleeve daily and love it.