Eucalyptus as a material is known as Tencel Lyocell. It is made from the pulp of eucalyptus trees. Eucalyptus Tencel is produced using a lyocell process exclusively from the wood pulp of eucalyptus trees certified by the Forestry Stewardship Council (FSC), and the fiber carries the Pan-European Forest Council (PEFC) quality seal. The eucalyptus goes through a similar process as other semi-synthetic natural fibers, such as Viscous bamboo fabric, but the Lyocell process used to make eucalyptus is more benign and eco-friendly. Eucalyptus as a material is known as Tencel Lyocell. It is made from the pulp of eucalyptus trees. ... The eucalyptus goes through a similar process as other semi-synthetic natural fibers, such as Viscous bamboo fabric, but the Lyocell process used to make eucalyptus is more benign and eco-friendly.