Lightweight, flexible and textured poly is 20 times stronger than paper based material and moisture-resistant to protect your documents. Features a spiral flap that stays out of the way for easy access. Unique expanding bottom slides out to 4" wide for more holding capacity. Secure elastic cord closure. File Jackets/ Sleeves/Wallets Type: Expanding;File; Material(s): Foam Polypropylene; Height: 10 5/8".