Gaylord Archival 3 mil Archival Polyester Newspaper Preservation Sleeves (5-Pack) Preserve newspapers containing important family and historical information before they start to deteriorate 3 mil archival-quality polyester is stable and inert for safe long-term storage Each sleeve holds one newspaper section without damaging folding Sealed on one long side (folder-style) for easy insertion of papers; electrostatic charge holds newspaper in place Designed for use with a Gaylord Archival Newspaper Preservation Box (sold separately) to minimize exposure to air and light