Skiing is definitely an extreme sport due to the hostility of the mountains and the harsh temperatures. In fact, skiing is probably one of the sports for which the equipment is most important. Socks are an essential part of this equipment.
Mohair socks are specially designed for top-level skiing and competition, as they combine technical advantages and comfort. These are warm without being overly thick (they remain comfortable when used in thermoformed skiing boots).
There are also other less extreme pairs of wool socks in the range of ski socks for more relaxed uses. But these ski socks are nonetheless ideal for downhill skiing or off-piste usage.