Australian lambs wool is the warmest yet breathable wool you can wear. I have one of these hats going on 10 years old. It’s my go to when I need a good warm hat outdoors. Breathable means it doesn’t create an environment where your head sweats leading to hat head.
I hand knit these, felt them and use a hat block to put back the size and shape.
They are deep so to cover the ears.
They will pack in a bag for easy traveling.
I can also do other colors - ask.