Cellulose obtained from trees such as eucalyptus, beech, spruce, or pine. Wood pulp is the primary raw material used in the production of regenerated cellulose fibers, including viscose, modal, and lyocell. The sustainability of wood pulp depends on forest management practices and the efficiency of the fiber production process. It's usually found in the following fibers:

• Lyocell: Most commonly souced from Eucalyptus, Beech and Spruce
• Rayon: Commonly sourced from Beechtrees, Eucalyptus , Pine, Spruce and sometimes bamboo pulp
• Viscose: Sourced from wood or bamboo pulp