P-V won't ever replace wool (too many died-in-the-wool traditionalists) but is a fair and decent alternative. I have my Maple Leaf in both wool and P-V so I'm covered from the hottest of summers and the coldest of winters. Marton Mills is a prime source of P-V in North America. or contact one of our kiltmakers to see if they'll let some go (USAKilts and Canadian Casual Kilts both use Marton Mills).