Review on 📱 Smartphone Stick-on Card Holder: Adhesive Silicone Wallet Sleeve Pocket for ID, Credit Cards - Universal Back of Phone Card Holder for All Mobile Devices by Christian Young

I've had one on my Otterbox phone case for about 6 months, no signs of it coming loose or tearing. I have found that I need to store 3 cards in the holder and only the 2 front cards slide out easily. I haven't tried adding more cards as I don't want to stretch out as 3 cards are enough for my daily activities. In this case, you can also easily keep several paper invoices. The cards are pretty easy to put in and take out, but they are definitely safe if there are more than 3 cards in them. There was a slight plastic smell at first, but that quickly went away. I'm currently using a white mount and although it bruises when I carry the phone in the back pocket of dark jeans, it rubs off with a little rubbing alcohol. I'd appreciate it if there were more color options on the darker end of things (a pack of something like navy blue, purple, black, and forest green would be nice).