My experience with cashmere is that it sheds all over everything. It's not hot and I don't remember it being itchy for me. I just didn't like seeing the stuff all over my dark colored pants.
This is the ride of my life.....what an amazing tool I now have!!!
I was given a cashmere sweater once that was worth several hundred dollars. It didn't shed at all. I then bought an affordable cashmere scarf and it shed like crazy. Big difference.