These Polypropylene Photo Sleeves are sealed on 3 sides, open on one shorter side. Archival and acid free, the size fits most regular comic sized items.
Some of our customers use these sleeves for documents and photos as well as comic items. They are archival, acid free, lignin free of course, and safe to use on items for the long term. The strip is on the body, not the flap, so the resealable process is better for your items because it's easy to keep the sticky part away from your item.