Wool felt used in hat production is a fabric obtained by carding sheep wool through felting, and not by weaving. This process consist in wetting soaped wool fibres with hot water and working them until obtaining the felting of the material. Only experienced artisans can carry out such a process that requires time and ability. Then felt is shaped by heat and steam in presses, and, once ready, it is completed and decorated.
This material is probably the first fabric produced by man: some findings can be dated back to the 3rd millennium b.C.. Ancient people used it for clothes, shoes and for tent covering as well: as it is waterproof, resistant and light, it can be considered an one-of-a-kind fabric.