Expanding file jackets are ideal for organizing & transporting your files. The 1/2" high, straight-cut, double-ply tabs are reinforced for added durability & easy indexing. Closed jacket sides help keep papers & loose items secure while the thumb-cut notch allows easy access. Use these file jackets in vertical or lateral filing systems. Acid-free, archival-quality folders are made of 11 point manila stock & 30 percent post-consumer recycled materials.