I have my share of beanies. It's my #1 go to when it's cold out as I'm folically/hair impaired. I've got a couple acrylic blends, a couple made from merino wool and a couple good ol Mil Spec wool ones. I'd say the acrylic ones are my least favorite, when they get wet, they are almost as bad a cotton. I love the straight wool ones but they can be itchy, especially with no hair as a barrier. So my preference has been the merino wool ones. The down side it the initial cost, they avg. 30-40 bucks, and aren't made in the USA. Sadly both the merino wool ones haven't lasted. They have both popped a stitch or a seam over time with only winter wear. My USA Mil Spec wool ones, I've had no issues at a 3rd of the cost. One way I've gotten around the itch is to wash them in luke warm water with conditioner. My go to has been Mane and Tail. Give them a good rinse and let them air dry. YMMV.