Functional.
DISCLAIMER: Im usually very skeptical of amazon products as I view them as junk made for pennies in chinese slave labor camps; products that would probably barely last a few uses before needing to be replaced in our consumable/junk/replace market. I opt to buy elsewhere and would sooner pay more at a more reputable store. That's my mentality toward Amazon. I bought this product on a whim and took a chance because I had difficulty finding them elsewhere for a price I thought was reasonable, and I chose to believe the positive reviews. Moreover I will update this review if my opinion ever changes. INITIAL TAKE: These don't look terribly impressive. It looks like a flimsy paper and you might think you got ripped off. Not very pretty. ACTUAL REVIEW: *Durability* I've had these for several years now. Pull my card out of the sleeve, which is tucked into my wallet, at least twice a day and then put it all back. Its not hard to do, its not too tight and not too loose. They have taken much wear but it isn't any worse for the wear after all these months. The sleeves are quite durable and are still going strong. One card per sleeve. There is no tearing or ripping. They don't last forever, but they last more than long enough. A single sleeve with my most-used card lasts me at least nine months, and you get like three per pack. I protect all of my cards with multiple packs and just cycle through the sleeves. You can fit maybe two cards per sleeve but I don't recommend; you risk wearing out the sleeve faster. *Functionality* I've tested them at merchants. A chip reader couldn't read my card from a quarter inch away while in the sleeve. I've tested this multiple times, at different merchants, and with different cards. I've sampled multiple sleeves from multiple purchases. It surprisingly does work and is quite effective. I very much trust these sleeves to prevent RFID skimming, especially from the distances required if it were in my wallet, in my pocket. *Packaging* They come bundled and wrapped in plastic, in a box or envelope. I've only ever once been disappointed in the package job. The bundle was slightly bent (not creased), as it was packaged in a box with a bunch of other loose fitted and heavier items. This is /not/ a manufacture issue, but a delivery issue. And its only happened the one time. The cards were bent back and are perfectly functional still. RECOMMENDED: Yes, absolutely. Highly. I've bought this product four times now over the past several years. Its bookmarked for future purchases. Please do give this a shot. Read more
