A hydraulically needled nonwoven pulp fiber web is disclosed. This nonwoven pulp fiber web has a mean flow pore size ranging from about 18 to about 100 microns, and a Frazier porosity of at least about 100 cfm/ft.sup.2. The web may also be characterized by a specific volume ranging from about 8 to about...http://www.google.com/patents/US5137600?utm_source=gb-gplus-sharePatent US5137600 - Hydraulically needled nonwoven pulp fiber web
