RFID is blocked, but map is too tight

First of all, the case blocked in fact reading the RFIDs. For me this was not the reason to buy (those who manage over such a short distance selectively read out one of the three RFID cards and circumvent the encryption, gets an A certificate and the PIN to), but since it is the advertised main function of the envelope which should be rewarded. (Tested with a HTC One X and a Dell XPS 12 - card without shell recognized to do anything with shell)

The interesting for me (as advertised) function was the mechanical protection - The buckling and breaking in the back pocket. This seems to work quite reasonable (but a bit the shells turn also), but the cards are sometimes hard to get more out of the sheath. In my debit card I have to open each time, push sideways and initially separated by the finger on the card in the envelope of the walls, because it seems there stick the envelope. Interestingly, I have this problem with my credit card - why this is, is beyond my knowledge.

Nevertheless, it makes the product at least for some card virtually useless, since you do not always have a few minutes to get the card out of the envelope.