Ply (layer)

A ply is a layer of material which has been combined with other layers in order to provide strength. The number of layers is indicated by prefixing a number, for example 4-ply, indicating material composed of 4 layers.


The word "ply" derives from the French verb plier,[1] "to fold", from the Latin verb plico, from the ancient Greek verb πλέκω.[2]



  1. ^ Collins Dictionary of the English Language, 2nd Edition, London, 1986, p.1181
  2. ^ Cassell's Latin Dictionary, Marchant, J.R.V, & Charles, Joseph F., (Eds.), Revised Edition, 1928, p.421