PhotoKeep™ Letter Size View Case Binders are a great way to store or display your 5x7 photograph memories. The inner sheets, outer case and rings are made of heavy duty 100% recyclable polypropylene. The case is fully enclosed and snaps securely to protect the contents; a durable and archival-safe storage case. A full wrap-around overlay allows you to create a customized cover insert for easy personalization. The snap-locking polypropylene rings won't pinch, misalign or rust over time.