Excellent choice — #1 of 31 Merino ranks #1 of 31 fabrics for excessive sweating. It is one of the best fabrics for this. Ranked on breathability and moisture handling, penalised for weight. It is the top pick.
Merino measures 80/100 for breathability, 15% moisture regain, 55/100 warmth, at 180 gsm. For excessive sweating, high breathability and strong moisture absorption decide comfort — and its higher warmth risks trapping heat against the skin.