We have a wide variety of sizes and thickness when it comes to laminating pouches--and here lie the 3 mil pouches! This thickness of films provide a lightweight, flexible covering. It will protect documents and other materials from spills, smudges, dirt, and some handling. So if you need more of a lighter protection and more malleability, then 3mil pouches are perfect for you! We have lots of sizes and colors to choose from--ask our representatives if you have any questions!