Very comfortable, even more so when worn with a liner. Recommended.
Perfect for trekking
Good: Great for trekking, and retain their padding properties well with extended use. The seam at the toe is better than some other socks I have tried.
Bad: Tend to lose some of their shape after a while but I never found this to be too much of a problem.
Overall: Highly recommended.
Experience: Completed the GR11 (Spanish Pyrenees) using these with no problems at all.