The orchard was pruned. Mom wanted ALL the clippings burned NOW. So, I did. However, twigs, even green twigs burn very hot. At the end of the day, I noticed that the flames had burned the pills and fuzz off of the sleeves of my gardening gansey. The wool protected my arms, and I never even noticed.
However, if I had been wearing a synthetic, my arms would have been toast.
I like wool.