The material feels nice, and the compression is good. However, the socks are so thick (padded) that I can not wear them in most of my running shoes that fit well with my other socks. So only buy if the shoes you intend to use them with are very loose fitting. In my view the extra thick padding, especially in the front of the foot, is just not needed with modern running shoes.
Comfy as hell
Enabled additional running without ankle pain.
Hands down best long distance running socks I own
The 4.0 series got moved to the top of the sock drawer and is getting most of the miles right now. Feet are loving them.