SECTION 1YARN FUNDAMENTALSFibre compositionsCertificationsFibre to yarn processYarn structuresYarn countDyeingYarn treatmentsPillingFactors for yarn selectionCase study NATURAL FIBRES ANIMAL FIBRES Wool (Wo) Cashmere (Ws) Mohair (Wm) Alpaca (Wp) Angora (Wa) Yak (Wy) Camel Hair (Wk) Silk (Se) PLANTS FIBRES Cotton (Co) Linen (Li) Hemp (Ca/Ha) Ramie (Ra) REGENERATED PLANT FIBRES Acetate (Ac) Viscose (Vi) Cupro (Cu) Ecovero™ Modal® (Md) Lyocell (Ly) Circulose® Infinna™ Refibra™ SYNTHETIC FIBRES MAN-MADE FIBRES Acryl (Pc) Nylon (Pa) Polyester (PL/PES) Polyurethane (Pu) Summary Overview Animal natural fibres >