PU Leatherette;RFID smartphone pocket protects your personal data stored electronically on credit cards, etc; Hidden Aluminum foil coating between PU panels for RFID (Radio Frequency Identification) identity theft protection; Removable 3M™ adhesive back for placement on smartphone, cell phone or mobile device; Non-residue 3M™ adhesive sticks to the back of your mobile phone; Single pocket doubles as a wallet – insert transit cards, credit cards, IDs, and business cards ; Product Size: 2.44″ w x 3.62″ h x 0.125″ d;