Merino naturally absorbs and releases water vapor within its fibers, but liquid water presents a different challenge. Woolmark's Moisture Management Merino treatment uses a hydrophilic softener after dyeing to improve liquid wetting. The reference stresses that the fiber surface must be clean, including removal of contaminants such as silicone, before applying the finish.

Treat Merino Differently for Liquid Water and Moisture Vapor

Heat treatment fixes the finish for durability. In a double-jersey construction, combining treated Merino with a hydrophobic yarn can also support liquid transfer through the fabric. This illustrates why a general statement about wool absorbing moisture is incomplete: vapor behavior, liquid contact, finishing, and the garment's knitted structure describe related but distinct functions.