This is the sock we wear for Nordic skiing here at Howl. It is the same as the Light Hiker Crew only with different labeling. A Medium Hiker Crew works also, as long as your boots are not too tight. As with Alpine ski socks, squishing a thick sock into a performance fitting boot only makes for cold feet. With cross-country skiing, your body generates a lot of heat, so you can ski down to very cold temps without a lot of extra insulation. For people with cold feet and poor circulation, we have outer boots that go on the outside of the ski boots to add insulation and they can be seen below. Then they boot fits properly and it is not sloppy, making you unbalanced.
Here is what Fits says about their nordic socks:
FITS® Light Nordic Crew offers lightweight cushioning in the toe, heel, and footbed. The crew-height construction is perfect for Nordic boots. The super-fine Merino wool makes for ultimate temperature regulation and moisture management while you’re out on the slopes.
Dynamic Toe Cup® contours to the shape of your foot.
Heel Lock® provides heel security that limits the chances of a blister when combined with a properly fit boot.
Super-fine merino wool construction.
Crew height rises just below the calf.
Super-fine Merino Wool 65%