Document sleeves feature a heavyweight construction to protect your frequently referenced papers from wear-and-tear. Acid-free, archival-safe polypropylene maintains its clarity for long-lasting organization. Nonstick coating prevents ink from smudging or rubbing off papers onto the sheet protector. Top-loading sheet protectors are designed to hold letter-size papers.Document sleeves feature a heavyweight construction to protect your frequently referenced papers from wear-and-tear. Acid-free, archival-safe polypropylene maintains its clarity for long-lasting organization. Nonstick coating prevents ink from smudging or rubbing off papers onto the sheet protector. Top-loading sheet protectors are designed to hold letter-size papers.