Closed on three sides to prevent papers from slipping out. Thumb cut front for easy access to contents. Back tab is cut 1/2" higher than front for indexing. Lightweight 11 pt. Manila stock offers excellent protection without excess bulk. File Jackets/ Sleeves/Wallets Type: Expanding Jacket; Material(s): 11 Pt. Manila Stock; Height: N/A; Width: N/A.