KnightKard RFID Blocking Card - Full Wallet Security 2 Pack- Identity Theft, Passport, Credit/Debit Card, Purse, Wallet - Fraud Protection Vital Remedy - Knight Card

These definitely work. I tested them right away using my key card reader at work. My key card could not be read through these cards. i even tested it with 7 cards in between, and still could not read through the cards. These are legitimate. I highly recommend!!

beware that the "2 Pack" is really one, since you have to place your cc's in between the 2 cards.they come in a sleeve, with confusing instructions; can you also use the sleeve as a blocker all by itself or....???i've emailed the company twice with no response, will update rating if i ever hear back.otherwise, it's a crapshoot for the 10 bucks

Can't tell if they work, hope they work. They look and feel like a thin credit card.

It work as far as I know.

Works well and doesn't bunch up wallet.

The media could not be loaded.  This product does not work at all

I have to say that I am not an expert at knowing whether or not this works. I'm sure that the Knight company knows their business and it works perfectly. It gives me peace of mind to have it in my wallet.

like nothing