Project Folders, Jacket, Letter, Poly, Clear, 25/Box, Sold as 25 Each Tear-resistant, static-free poly project folders are open on two sides, thumb cut and letter size. Tear-resistant, static-free folders divide and organize your many work projects. Open on two sides with thumb cut for easy loading and access. Use by themselves or to separate and organize information within file folders. Polypropylene material eliminates photocopy transfer.