I work at a large hospital in Louisville, Kentucky where our patients are admitted with valuables and/or large sums of money on their person from time to time. We have found these specific property bags to be an excellent way of inventorying and securing various personal valuables. Being able to write on the outside of each bag with a ink pen rather than using a Sharpie marker is great. And once they're sealed, they are sealed. I give this item a thumb's up for quality.