Archival-quality folders inhibit the growth of mold, mildew and odors. Documents won't yellow or become brittle. 11 pt. Manila folders are stamped with logo to differentiate from regular filing products. Scored for 3/4" expansion. Lasts a minimum of 50 years. Acid-free. This product was made from wood sourced from a certified managed forest. File Folder Type: Top Tab; Size: Letter; Folder Material: 11 pt. Stock; Color(s): Manila.