I purchased two (red and blue) for my husband and I for our credit cards.  We were watching a respectable news program and seen a similiar program on another channel where we need to protect our credit cards with an aluminum wallet so thieves won't steal your credit card numbers. Thieves use a scanner that's hidden under their jackets and when you're standing in line at the mall or in a restaurant, etc. they scan all of your credit card numbers (including store credit cards) including your name on the cards. It doesn't matter if the wallet is in a purse or pants pocket.  The aluminum prevents the scanner from retrieving your credit card numbers. Sad that we live in such an age where NOTHING is safe anymore! The only thing that we both had to do was to downsize our wallets which wasn't really a bad thing.