Lyocell (Tencel)

Lyocell is a fiber produced by dissolving wood pulp, most commonly from eucalyptus trees, and spinning it into filaments through a closed-loop process. Tencel is a common branded version of lyocell, so the two names usually refer to the same underlying fiber type on a label.

The fiber structure has a naturally smooth surface and absorbs moisture efficiently, which is why lyocell sheets and pillowcases are frequently recommended for both breathability and wicking together, rather than just one property. It also drapes softly and resists wrinkling more than plain cotton, which is part of why it shows up in premium cooling sheet lines.

A frequent point of confusion is lumping lyocell in with bamboo viscose because both start from plant pulp. The closed-loop lyocell process uses less water and fewer harsh chemicals than typical viscose processing, and the resulting fiber tends to hold its shape and coolness better over repeated washing. When comparing sheets, check whether a bamboo product is labeled viscose or lyocell, since the two perform differently.