I have had this product for a year and it is sinmoly the best memory card storage wallet/case I have ever used. I keep in my Lowepro camera bag which is kept in the truck of my car at all times and never had any issues with it. One of the bonuses with this is that I can carry an xD card and a CF card in the same slot (xD card fits neatly under the CF card). The cards fit snugly into the case slots yet are easy to remove when needed.

I carry 4xD cards and 2 spare CF cards in this case.