Grip6 walllet and cash band: If your primary use for a wallet is to carry cards and ID, then unless you have a ton of them, this'll do the trick. If you need more space, look into the cash band accessory, and I suspect many of the wallets designed to stick on the back of a smartphone will work just fine stuck on this, too, just check your measurements to be sure. I'm pretty happy with it overall, but I do feel like there's some room for improvement in certain aspects of the design. For example I'm not carrying as many cards as I normally would (This wallet was a replacement for one that had gone missing and so I still have a bunch of replacement cards that are on the way), and I don't like how they rattle around in there. An insert of some type would be a great addition. Also, I wish the tab that holds the cards in place were just maybe half again as long. I know it might be a bit of an engineering challenge to do that and maintain ergonomics, given how the mechanism works, but it would make it feel much more secure. Speaking of security, the cash band has great tension, at least for now, but I would love it if it had a top flap to prevent me from accidentally tugging on the release strap and dumping out the contents of the band into my pocket, or worse, the ground. Grip6 belts: Both widths are of excellent construction and I the overall design is really clever. I'm a little afraid of the fact that there doesn't seem to be any sort of quick way to release them should I need to make an emergency bathroom stop, but other than that, I'm very pleased!