As my tests showed this leather holder strap is a great way to keep your vaccination card protected and organized. It's well-made and durable, and the size easily accommodates different vaccine cards. The strap also makes it easy to attach to your keychain or other items for safekeeping .The only potential downside is that it only holds one card, so if you need to carry multiple cards, you may need to purchase additional straps. Overall, it's a highly recommended solution for anyone looking to kSee full review