Knitting jumpers for homeless kids. Is acrylic yarn just as warm as pure wool?

maggie rose asked:


I’m knitting for orphans and homeless kids here in Aust. and in countries where winter temp is below zero. I can’t afford to buy a lot of wool, but have also been using 8 ply acrylic yarn doubled, as I can afford lots more of that. Now I have been told it won’t be very warm. Is this true???? Any ideas please…………

Delta Sky Miles