Constructed from acid-free, archive-safe polypropylene material, these sheet protectors cover papers without lifting the ink from the pages. These Avery lightweight sheet protectors are top-loading for convenient insertion, and three-hole punched, so you can easily add or remove them from binders or folders as needed. Sheet protectors to prevent degradation of paper inserts Clear polypropylene material provides easy viewing Protects 8.5″ x 11″ sheets of paper Three-hole punched and ready for use 100 per box Archival safe for long-lasting protection Specifications table Attribute name Attribute value color & material True Color The PRIMARY material that the item is made of. Polypropylene/PP Color Family Acid content determines how long the paper or product will last before breaking down. The acid level is measured by the pH (potential of hydrogen) on a scale from 0 to 14. Acid Free (alkaline) paper has a higher pH (above 7), has a longer life expectancy, and is less likely to discolor and break down over time. Acid Free Anti-Glare Refers to the number of sheets of paper a protector can hold 1 Water Resistant 3 Sheet Protector Durability Semi-Clear style Sheet Protector Type Top Loading additional details Next Day Delivery 100 to 140 Series or Collection 100