Tuff Pockets are virtually indestructible yet they look like standard redrope files. They pass the toughest tests and last for years, even when loaded with large, heavy files, catalogs or notebooks. 6-1/2" high sides and bottoms are fully lined with tear-resistant Tyvek. Special rollover reinforcement at the top extends into the front and back panels twice as far as standard file pockets. Heavyweight, 7/8" front and back panels provide rigid support and have a hidden reinforcement strip at the point of greatest stress. Extra-wide pockets accommodate standard-size, top-tab file folders.