Not recommended — #27 of 31 Polypropylene ranks #27 of 31 fabrics for hot flashes. It is a poor fabric for this. Ranked on breathability and moisture management, penalised for warmth and weight. The top pick is Linen.
Polypropylene measures 40/100 for breathability, 0% moisture regain, 40/100 warmth, at 120 gsm. For hot flashes, low breathability and limited moisture absorption decide comfort — and its higher warmth risks trapping heat against the skin.