Long fibers: acrylic high bulk
Short fibers: polyester / viscose / acrylic
Intimate mixtures and channel look until three components:
Open end : NM (Metric number) 14 to NM 50
Classic : NM 20 to NM 90 simple yarn or twisted
BERICOLOR transforms also different elasthans such as Lycra, Dorlastan, Spandex.