Which is the warmest per weight...
Which of these three is the warmest per weight:
Alpaca wool
Cashmere
Angora RABBIT fur (as distinct from angora GOAT)
Here's why I'm asking:
I'm going thrift-store-diving this weekend. The consignment stores are now getting rid of winter sweaters for cheap! I'd like to buy a fabric that is even lighter than merino wool, per weight. (Merino wool is actually kinda heavy for the warmth it provides.) This is for around-town, and/or for very delicate use on a bike or for hiking (under a shell, to protect the fragile fabric).
I realize it'll be more delicate than merino...But for $10 second-hand, I won't worry about that.
Thanks!