How do they do it?

Magaschoni makes the softest knits I have ever touched in my entire life. I tried this cardigan on today and my skin thanked me. Then it got mad at me when I had to take the sweater off. Sorry skin. Anyway, this particular piece is available in sizes S, M, and L and is priced at $238. It's 60% silk, 40% cotton. I guess that explains the softness?