What is modal fabric?

Modal is a semi-synthetic fiber made from regenerated cellulose, most commonly sourced from beech tree pulp. Like lyocell, it belongs to the family of regenerated cellulose fibers, but modal is produced using a modified viscose process. Lenzing AG, the same Austrian company behind Tencel, produces a branded version called Tencel Modal that uses a more environmentally responsible manufacturing process with higher solvent recovery rates than standard modal production.

Modal is known for its exceptional softness — it has an almost silky feel that makes it popular for underwear, sleepwear, and garments worn directly against the skin. It resists pilling better than cotton, retains its shape well after repeated washing, and has a smooth surface that drapes beautifully. Modal is also highly absorbent and breathable, making it comfortable in warm conditions.

The sustainability profile of modal depends heavily on the manufacturer. Standard modal production uses chemicals similar to the viscose process, which raises environmental concerns. Lenzing's Tencel Modal, however, uses an integrated pulp-to-fiber process with substantially higher resource efficiency. When evaluating modal products, check whether the manufacturer specifies Tencel Modal or just generic modal — the difference in environmental impact is significant. At ONDU, we prioritize brands that use Tencel-branded fibers when featuring modal-based products.