Beautiful packaging and universal appeal make CardNinja a geat gift item too! (And the perfect stocking stuffer!) As simply as peeling a sticker, CardNinja attaches to your phone or case using high strength adhesive and won't come off until you want it to. And you can remove it cleanly without leaving any residue! It also holds its contents super tight: nothing will come out of your CardNinja, even if you flip your phone over and shake it! Whether you carry a bunch of cards with you for work, or just a few to run errands, the CardNinja adapts to you. It's made from a strong and resilient custom blend spandex style material, so it stretches to accommodate several (up to 8+) cards, but shrinks back down when empty or only carrying a card or two. At only 2.5mm thin, the CardNinja is discreet, like a Ninja! Made from reinforced elastic material, it is designed to withstand being put into your pocket or purse day after day without wearing. It's also designed to resist tearing from repeatedly inserting and removing your credit cards. The CardNinja is perfect for quick trips, hiking, biking, the gym or a night on the town OR Toss your bulky wallet and switch to CardNinja for everyday use!