SOJITEK MICROSOFT LUMIA 550 Handmade Black Genuine Leather Wallet Case with RFID Blocking Technology Protection , ELASTIC Closure Book Style / Card Holder / ID for Men & Women 100% Cow Genuine Real Leather: lasts longer and ages better than synthetics over time; repels water, dust, fire, and fungus growth; beautiful to look at and soft to the touch; natural, no synthetic additives or chemicals RFID Blocking: Peace of Mind. Blocking 13.56 MHz Frequency in which the credit cards and passports operate. Special RFID Blocking Golden Cloth to Stop Thieves from Obtaining Personal and account information. (Doesn't block 125 KHz RFID tags and cards) Phone pocket: Easy slide in phone pocket on the right Pull-Tab Pocket: Hold up to 4 credit cards