Now there is a tear and water-resistant solution for keeping bulky documents safe and secure within your filing system. These poly file jackets have a full-height gusset and are enclosed on three sides. Color code your files with easy-to-spot colors. These file jackets are well suited for storing charts, photos and bulky documents that do not fit traditional file folders. 1" expansions provide more storage capacity for classroom materials than standard file folders. Acid free. Assorted Colors. Letter size.