Tyvek File Pockets provide extra durability to protect your important documents. Extra durable front and back covers hold large, bulky files and small loose items. Gussets expand with your project needs. Fully lined, Tyvek-reinforced gussets with added rollover feature provide wear-resistance and tear-resistance. Full-length tab on the back cover provides room for labels or handwritten titles. Front flap folds down for easy access.