For how thin this merino fabric is, it sure delivers warmth. They are super soft and comfortable to wear for extended hours. The 3/4 length is just about perfect for skiing, as I was sick to death of rolling up my cuffs to get my thermals out of my ski boot. I highly recommend these for their comfort and performance. I only wash them every other time since the Merino wool doesn't get stinky! Definitely a good choice!