Over the years I have accumulated a lot of SD cards. Why don't you just format one and keep using it over and over again I hear you ask? Well, yes that would be a solution but there are a combination of factors - not finding a card when you want one, not being in the same place as the cards when you need on and, of course, sheer laziness! So buying this case is as much as a storage solution as to keep the SD (and Micro SD) cards safe from damage. It is a rigid well made hard case with a snap close clasp. The SD cards (up to 12 in total) fit neatly into the recesses (I have not tried Micro SD cards in it yet). There is a thumbnail space from which to prise out the cards. Without it, getting the cards out would be almost impossible - that's how snug they fit. I think that 'water-resistant' is accurate and the case might even be waterproof but I am not going to test that. The integral 'loop' allows for the case to be connected to other items such as a rucksack or key chain (it is probably too big for that but you get the idea). The inclusion of a small microfiber cloth is a nice touch - I lie it over the cards to keep it handy. All in all a well made and attractive (in a techie sort of way) SD card storage/protection case.