People ask if merino is quick-dry. If that means "beats polyester at dumping liquid off the face of the cloth," the honest answer is no.
Quick-dry is not how fast a fabric drinks sweat. It is how fast sweat leaves the skin, reaches the outer face, and evaporates. Polyester and nylon absorb almost nothing (regain around 0.4% and 4.5% in the classroom piece). They move liquid by capillary action. In moving air that feels fast. In still air it can feel wet and cold, because the water never really left you.
Wool takes vapor into the fiber. Moisture regain around 25–35%. It dries more slowly, and it can still feel dry on the skin after holding a lot of that moisture, because the wet is inside the fiber. Taking vapor in gives a little warmth; letting it go takes heat with it. Water also moves heat away much faster than still air. Keeping the skin surface dry is the point.
Want wool to dry faster? Lower the gsm. Blend nylon (the piece cites a 50/50 example). Add mesh. That is a trade, not a magic trick. Thin pure wool also tears more easily.
How we would pack it: hard stop-and-go effort in the wind, a synthetic next to skin plus an extra layer. Hiking, walking, short travel, stopping often — light merino or a merino blend. On trips where a warm base layer is treated as safety kit, do not swap it for a generic synthetic just because the hangtag says quick-dry.
Wool is not trying to be the fastest-drying cloth. It is trying to keep you comfortable for longer. Match the fiber to the day.
Wear Nature, Go Further.
ZEALWOOD