Poly folders in super bright colors will liven up your desktop & are easy to find in any filing system. It's the toughest file folder around, & it comes in opaque colors to color code your filing system for speed & efficiency. Durable poly material is tear & water resistant & easy to clean. Fits any vertical or lateral filing system. File Folder Size Type: Letter; File Folder Color: Blue; Color Family: Blue; File Folder Material: Polypropylene.