I'm about to buy one of those RFID protection wallets by Secrid but needed some clarification on something. I've done some research but can't seem to find the answer.... Are RFID credit cards only the cards which offer the "wave and pay" feature? Or are the credit cards which have that silver or gold chip on the exterior of the card RFID cards as well? So basically theory holds that people can scan your credit from a distance. But can they only do this for the "wave and pay cards" or can they do it with all chip cards, such as the Chase Marriott credit card? Is the Chase Marriott card an RFID card? Finally, which credit cards offer "wave and pay" technology? I'd like to get one! Thanks in advance!