It's becoming more common for credit cards to have an RFID chip inside them, which enables contact less transactions. There is some controversy surrounding RFID in regards to how secure it is, such as people being able to get information from you by scanning your cards without your knowledge. Card sleeves like these which prevent people from doing such are a must!
The card sleeves themselves are thin, but still feel durable enough to not fall apart or get ripped while being constantly moved around in a purse or bag everyday. These fit nicely in my wallet with the rest of my cards and such. They don't add much bulk at all.
The design of the sleeves is simple. They're come in different colors. The inside is silver. They are about the same size as a credit card, and the dip at the end of the sleeve lets you see which card is inside. Though, if you plan on keeping a lot of these around and have cards that look the same, you might want to write something on the outside of the sleeve itself, just for convenience.
SECURE YOUR FINANCIAL AND PERSONAL DATA NOW
BLOCKIT Sleeves will protect your privacy and secure your most valuable data from digital pickpocketing. Each BLOCKIT Sleeve is engineered using 3 performance layers - A layer of aluminum material blocks 13.56MHz frequencies, a copper substrate layer blocks all 125kHz, while the outer layer is a glossy paper with attractive full color design.
PROTECT: Your Family and Friends from Credit Card Fraud, Identity Theft and Digital Pickpocketing.
6 FASHIONABLE DESIGNS : Color Coded Making it Easy to Locate the Right Card, Every Time.
FIT : Your Cards Fit Snuggly Inside Plus They Fit Easily in all Wallet Card Slots.
EXCLUSIVE TECHNOLOGY: BLOCKIT 3-Layer Construction for Maximum Protection
If you have a credit or debit card there is a new digital security threat you need to be aware of. An estimated one-third of all existing Visa, MasterCard and American Express cards have an embedded radio frequency identification (RFID Chip) that carries financial and personal data- which digital thieves can steal in seconds. It's called DIGITAL PICKPOCKETING. Using digital readers they buy off the Internet for about $100, unscrupulous people- without ever touching you- can steal your name, account number, card expiration date and other information off your card, while it's tucked away safely in your wallet.
Amazon Link: http://www.amazon.com/gp/product/B00W4LEMO8
I received this product in exchange for my honest unbiased review. However the opinions are my own.