azealia banks is that friend that does something uncool trying to be popular and the rest of you are like ‘dude that was uncool’ and she’s like ‘FUCK THAT BITCH’ but then goes home at night and feels bad about herself and wonders if we’ll all be her friends tomorrow at school.
Ok… While I wait for my hair dye to finish processing, time for the super duper fiber geekery. Time to go all the way to the microscopic structure and how that structure affects the finished product.
Do you see how the animal fibers in the above picture look like they’re almost made of fish scales? Well, that scale like structure is the secret. Animal fiber is warmer because those scales link together in random formations and trap the air underneath, forming an insulating layer. It’s also how animal fiber can felt. Those scales link together more and more and eventually you end up with felt. You can even see why wool would felt better than alpaca or cashmere. There’s more scales than cashmere, and the scales are deeper than alpaca.
Linen has a little bit of scaling to it, so it would keep you warmer than silk. And cotton’s got a little roughness to it too. Silks are only warm when it’s a heavy fabric. Now I firmly believe that a heavy weight silk may just be some of the most beautiful fabric in the world, but it’s not something I’m going to make for winter. Just too dang pricy.
And polyester… yeah… it’s got nothing. It’s a completely smooth fiber. Because it’s completely smooth, it lacks the ability to create an insulating layer of air. It just can’t trap that air in.