Good tight fit around the arches of your feet. Wool is absolutely amazing if you haven't tried it! Just as a test, I've been wearing the same pair for a week now. They still do not stink! I'm a nurse, so I'm on my feet all day.
I bought these to wear for a cross - country trip. They kept my piggies nice and warm but the wind did cut through these through my boots. I would buy a heavier version next time though these were good for 5-6 hours.
Excellent fit. Extra padding in high pressure areas is great. Welt areas appear to provide message. Very comfortable even the going on the third day. Wish they were longer and there was key to the washing symbols. What ever happened to writing prose.
These PhD socks are cool because they only have padding in areas where you need it -- the heel and toebox. Elsewhere, they're lighter elastic, which is great for keeping your feet cool and dry around the arch and top of the foot. Of course, if you're used to thicker-all-around socks -- and critically, if you've broken in your hiking boots with big bulky ones -- you might have to adjust a bit. But it's worth the adjustment. I wear size 10.5 and got the Large, and they fit well. I was worried at first that they were too small -- they fit really tightly -- but that's so the friction is sock-boot rather than foot-sock, preventing blisters (and removing the need for liners, if you're like me and hate wearing two layers). These are relatively thin and best for three-season hiking/backpacking: if you took these winter hiking/climbing, you would freeze. (Go for a thicker pair if you want warmth in sub-40 degree temperatures).
I love smartwool socks. Super soft, warm, and breathable. They also do a good job at keeping my feet from sweating too much (which is sometimes a problem with other socks). And they don't really absorb odors or moisture and themselves stay dry and fresh without washing for longer than most other socks I've worn.
"These socks are dialed in like my saddle height"
Whether its 30* F and raining or the brutal Louisiana sun is beating down, these light, wool socks regulate your foot temperature while cycling unlike any other. They are like a base layer for your feet, making sure that the last thing you're worried about on your ride is a blister or cold feet. Save those for your wedding day.
This is a well made sock, comfortable with extra padding in the right areas so you won't get blisters on the trail. You can't have too many pairs of these. They feel even better when you slip on a pair of Zamberlans over them... :)