OEM Smead Heavyweight Super Tuff File Pockets are virtually indestructible yet resemble standard redrope files. Designed to withstand heavy use, they last for years, even when loaded with large files, catalogs, or notebooks. The 6-1/2" high sides and bottoms are fully lined with tear-resistant Tyvek, while the tops feature special rollover reinforcement for added durability. Heavyweight, 7/8" front and back panels provide rigid support and include a hidden reinforcement strip at the point of greatest stress.