I am usually a Smartwool and Darn Tough kind of guy, but when I wasn't about to turn down a free pair of Fits Ultra Lights when there were handed to me by the rep. Plus the rasta color way is pretty chill. Ultralight socks are the only way to go, and merino wool is the only way to go. If you don;t know, merino wool is not your itchy wool sweater. It is a naturally antimicrobial and moisture wicking fiber which absolutely kicks ass.
So here are specs off the package. I have a size large with fits (pun intended) a mens 8.5 to a 10. Fits offers a guaranteed fit, if you are unhappy with the skiing you have, they will replace them within 30 days for a different size. Gotta love companies that offer guarantees. The socks are 51% wool, 36% nylon, 9% polyester, and 4% lycra. And the best part? They are made in the US! Tennessee may not be the coldest place in the world, but I guess they have some sock making skills.
The Fit: I bet you can guess by the name of the company that these socks feel good on your feet. Their whole thing is making the socks comfortable at the seams. The heel cup and toe have a Y shaped seam which eliminates that classic bunchy feeling. Really dope right? The socks stretch quite a bit and they feel really good on your foot. And they come up very high on your thigh; I am 6'1" and they come up almost to my knees. No bunchiness of wrinkles anywhere.
The performance: I have skied in them a few times, my boots are too big and i currently need to where a light weight or medium weight for my foot to stay planted. Regardless, they were very warm and very breathable the few times I skied in them. In case you do not know, a thin sock is ideal in a ski boot because the less material there is between your foot / leg and the boot, the less there is in the way to cause issues. The less material there is on the top of your foot, the less likely your veins will be pressed on causing cold toes. The socks wick well because of the natural properties or merino wool. Boots were not as sweaty as they could have been in a thicker sock. These socks did chaff my navicular; the weave / "thread count" if you will is not as tight / the sock is not as soft as my Smartwool ultralights. If you have sensitive skin on your feet, perhaps look elsewhere.
Overall, all ski socks that are thin and merino wool have my vote, regardless of brand. The Y seam is a huge plus and only ups the comfort factor. These are my go to sock in the shop for boot fitting. And for the same price with a better quality merino wool than some of the other brands at $20 per pair, they are definitely worth a shot. You can never have too many pairs of ski socks!