Transparent, moisture-resistant polypropylene envelope keeps materials neat and clean. Horizontal, file-style orientation makes inserting and removing documents easy. Full-sized, open-top back pocket provides convenient quick-access storage space. Durable elastic string and riveted button closure is designed for heavy use. Sleeve & Jacket Type: File Jacket-Tabless; Material(s): Polypropylene; Height: 9 1/4″; Width: 12 1/2″.