Pendaflex Tyvek Premium Reinforced File Pocket, 3 1/2" Expansion, 9 1/2" x 11 3/4", Dark Brown, Box Of 10 File Pocket - Featuring tough material that helps prevent tearing, each Pendaflex Tyvek premium reinforced file pocket helps ensure your documents stay safely filed away. The sides expand to hold all the documents for a specific project in one place.