Credit Card Holder Waterproof RFID Blocking Protection Aluminum Wallet ID Card Business Card Case for Men and Women by SamGreatWorld

At 40p for 10, I thought they'd be useless, but it was such a small gamble.... Serve their purpose, tested them by trying to use contactless with the card still inside, happy to say the card didn't work til I took it out. They get tatty after a while, so just use another!! Great for the money

Arrived quick enough and not a lot of money. Not sure about durability not had long enough. Main bugbear is the pouches are too big to fit in any wallet (that I or my wife) have, rendering them unusable for their principal purpose. If uou have credit cards or similar that you keep separate to your wallet etc then could work for you but not sure when that occasion would arise. Also have no way of checking they actually work, so jury out on that one.

I originally got some to stop 'card clash' when going through the barriers on the London Underground and they work.I have now put them in the outermost compartments of my wallet and credit card holder. This is in case people really could brush up against my bag with a card reader device and steal from my bank account – not sure if this crime actually exists or not, but it sounds possible.

I have tried using the card case versions of these, both aluminium and steel. Both were cumbersome, uncomfortable in the pocket and they got bent out of shape. These soft ones are great because the just fit in your normal wallet and are flexible - and boy do they work. I have tried using the shop card readers with my card in one of these sleeves, and even touching against the reader - NOTHING. I cannot recommend these enough.

Could be slightly less long 3-4mm & would then fit perfectly into most wallets. As it is I had to partially fold the crimped end to fit in. Great value for Purses 5/5*

I got these because my works access card was being interfered with by other cards. Put this in my card holder to insulate one from the other and had to remove it again as neither card worked. This proves these work even without the card being in the wallet. Recommended.

These do work because I’ve checked them at the till with my card in and it does block them. They are good value for money too but the only gripe I have it that the ends crease and they are a bit fiddly getting the card back in when you’ve used it but other than that they are good value for money.

Arrived in good time, sturdy in make. Easy to use and put card into.. And I've actually managed to put my card into one of these sleeve and fit it into one of those card holder box thingys. 👍 Excellent price for a pack of 10 too.. will be handing out a few to family.