Unfortunately, many skiers make the mistake of using ordinary cotton underwear. Then it doesn’t matter if you wear a polyester baselayer outside the underwear – the cotton will absorb the sweat and quickly cool you down. It would then be better to skip the underwear and just wear a functional baselayer closest to the skin.
Outside of underwear, wear a baselayer made of polyester. For optimal function the baselayer should fit tightly, even in the armpits. Otherwise the moisture may not be transported out of the garment but instead remain on the skin where it creates a chilly “lid”. For cold and windy conditions you can choose a baselayer with wind-protective fabric at the front. However, it’s often enough with a normal baselayer combined with a pair of underwear with wind protection across the genital area.
For those of you who prefer to take it a little bit slower in the tracks, underwear with a mix of polyester and wool is a great option. Wool doesn’t provide as efficient moisture transport as polyester but has very good thermal properties, making the combination of polyester and wool the perfect choice for low-intensity workouts in low temperatures.
Socks should also be made of polyester, or polyester and wool if you are prone to cold feet. In cooler conditions, some skiers prefer to wear two thin socks, which provides a warming layer-on-layer effect, while others choose to have a thicker wool/polyester sock. Be sure that it doesn’t get too tight in the boot, which would eliminate the insulating layers of warm air between the boot, sock and foot. Another tip is to ensure that your feet are dry when putting on the socks. Then you reduce the risk of freezing, since moisture transfers cold rapidly.