[chrisseaton]

> One example is Icebreaker Ultralight socks.

The website says they're actually 38% polyamide and 2% elastane. I think they're 'wool mix' socks rather than wool socks.

[bloodorange]

Indeed. I think that is to allow them to stretch. If you take something like a shirt, for example, it'll be all merino wool.

EDIT: Also I see that the proportions differ based on the type of socks.