A solid choice — #10 of 31 Alpaca ranks #10 of 31 fabrics for excessive sweating. It is a good fabric for this. Ranked on breathability and moisture handling, penalised for weight. The top pick is Merino.
Alpaca measures 58/100 for breathability, 14% moisture regain, 88/100 warmth, at 220 gsm. For excessive sweating, modest breathability and strong moisture absorption decide comfort — and its higher warmth risks trapping heat against the skin.