These are two flat pieces of plastic with a decorative layer of carbon fiber under the outer surface. When empty it's about 5/8 inch thick (ignoring the money clip on the back) and with 9 cards it's still only about half an inch thick. There are elastic bands on three sides and the side opposite the finger cutout is open for card insertion/removal. The elastic strap keeps it pretty snug (at least when it's new). Inserting and removing cards for use is not that difficult. I haven't verified his RFID blocking claims yet. I've been using it instead of a traditional wallet for about a week now and love how much smaller it's and I can slip it into a couple of small zip pockets that either a regular wallet can't hold or if it's uncomfortably bulky you're trying. It was also an excuse to strip down what I carry to the essentials, and I could get even less if I excluded things that are also part of my phone's e-wallet. All in all it seems good for its purpose.
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