This credit card holder use RFID Blocking Technology to keep your cards are safe from identity thieves who are walking around attempting to scan your information from your cards. You can put your credit cards in here and they are protected from damage.This card Aluminum and Pu wallet made of Aluminum which makes it more durable and use time longer than plastic and a leather one. Very sturdy, resists wear, not easy to bend deformation. Keeps everything dry and safe in your pocket and bag.