Looking at the Sunday papers I noticed an advertisement for an RFID Blocking wallet.
Wondering what on earth that was I did a little research and came up with a site on eBay which offered some of these items and an EXPLANATION of the subject of RFID blocking.
It is well worth looking at the videos on the attached link to see what can be done using a hotel door card!
See
http://www.ebay.co.uk/itm/RFID-Blocking-Travel-Wallet-Biometric-Passport-Credit-Debit-Card-Document-Holder-/190739966268?_trksid=p3284.m263&_trkparms=algo%3DSI%26its%3DI%26itu%3DUCI%252BRTU%252BUA%252BFICS%26otn%3D21%26pmod%3D140873569709%26ps%3D54
(Also found that the above site offered the same or similar product for £5 less........but that is news paper special offers for you)