I bought this locking bag to store my notary book and stamp, but found that it’s large enough to store a receipt book and money bag, too. Everything I need to perform a mobile notary signing fits comfortably in this bag.The lock is a little tricky to figure out. Once I figured out how to properly lock the bag and zipper together, I knew I’d found the perfect bag to transport and protect my notary tools.The bag seems to be made of a heavy, durable nylon. The clear plastic/vinyl window on the front of the bag is a great place to store extra business cards. It makes it convenient for me to hand out my business cards without rummaging through a wallet or purse.If I ever need to buy another notary bag, I’d definitely buy this one again.