C-line® Clear Polypropylene Letter Size Project Folder Contain An Additive That Allows Them To Biodegrade In Landfills Without Leaving A Toxic Residue. Reduced Glare For Easy Viewing Of Contents. Open 2-sides With Thumb-Cut Front For Easy Access To Documents. Unique Corner Design Allows Letter-Size, 8-1/2" X 11", Project Folders To Expand To Hold Up To 100 Pages.