Preserve your information today & in the future. EverFile paper is a unique stock developed especially for the long-term preservation of your important documents. Each folder with fastener is acid-free & lignin-free & remains chemically stable for 50 years or more. Won't cause your stored documents to age & become brittle. File folder is also treated with an antimicrobial coating to resist mold, mildew & associated odors. Meets PAT standards recommended for storage of photographic paper or film. Folder has straight tab & contains two 2" fasteners in positions 1 & 3.