Heavy-Duty File Pockets, 3 1/2" Expansion, 8 1/2" x 11", Letter Size, 30% Recycled, Brown, Box Of 10 File Pockets - Keep all the documents for each project you work on safe and organized for easy reference with the Office Depot heavy-duty file pocket. Gussets made with Dupont Tyvek material are reinforced for secure storage and feature rollover protection to help prevent wear.