third and fifth layer extending in a first direction and the yarns of said second and fourth layer extending in a second direction perpendicular to said first direction the yarns of one layer being unbound by the yarns of any adjacent layers; and binder means for binding said layers. 12. The press felt of claim 11 further having a machine direction and a cross-machine direction wherein said first direction is the machine direction and said second direction is the cross-machine direction. 13. The press felt of claim 12 wherein said binder means comprises threads which are passed perpendicularly through said layers. 14. The press felt of claim 13 wherein said threads extend in the cross-machine direction. 15. The press felt of claim 13 wherein said first， must resist compaction， 18 and 20. The yarns of the first。
repetitive compression cycles before the caliper deteriorates to a point where it can no longer handle water. In other words， and at the same time the physical construction of the felt insures its dimensional stability. Both of these characteristics are enhanced by the binding thread which provides a vertical support member. Furthermore， it is well known that "knuckles" formed when one yarn changes levels or is partially wrapped around another yarn in woven fabrics are weakness points which wear away relatively rapidly. Since the present fabric lacks "knuckles" its useful life is much longer.