Nothing too magical probably..it is just not as thin and the fibers are more robust. Yeah! Petrochemicals. 🙂 For socks, and some of my hats, I still like wool. Thermal tops and bottoms? Fantastic..but very expensive for how long they last IMO. Always a trade off.

EDIT: Sorry, I thought I was replying to a different thread/article. I don’t think synthetics, being petro based, will soak up the lanonlin. I don’t think it will hurt, but I don’t think it will be effective either.