Buying Guide: Base Layers

Synthetic base layers

Synthetic base layers are usually made of polyester. It is a material that dries faster than most others, which makes synthetics a good choice in slightly wetter conditions. Polyester has good moisture-wicking properties that help keep you dry and therefore warm. It is also very hard-wearing and has good stretch, which is a big advantage for a base layer, as it should fit snugly against the body.

A synthetic base layer is well suited to high-intensity activities. The higher the intensity, the more synthetic material you should be wearing. A good example of when to choose a synthetic base layer is cross-country skiing.

+ Quick-drying.
+ Good moisture wicking (e.g. CoolMax, ThermoCool & DriFit).
+ Hard-wearing material.
+ Good stretch.
– Can start to smell sooner than natural materials such as wool. (Some models have odour-reducing properties, for example by using treatments such as Microban and Polygiene).
– Can be prone to discolouration.

Wool base layers

Wool base layers are usually made of merino wool and suit colder weather. That said, merino wool both warms and cools, and it works brilliantly next to the skin to wick moisture away. Its soft fibres make it comfortable to wear, while keeping you cool when it is warm. This is what is known as good breathability.

A wool base layer is great for activities where the intensity alternates between high and low – alpine skiing, for example, with high intensity on the way down followed by low intensity on the lift. You then benefit from the warming, insulating effect when the intensity is low and the moisture-wicking effect when it is high.
+ Good moisture wicking.
+ Antibacterial properties.
+ Both warming and cooling.
+ Can be worn several days in a row without much odour.
+ Keeps its shape, even after use.
– Shrinks easily if washed incorrectly.

Different styles

Today there is a whole jungle of base layers in different materials and styles. Once you know which material suits you, it is time to look at which style to choose.

With a hood suits you if you like a little extra protection under your helmet. For some, a hood can replace a beanie or headband. The advantage of a hood is that it protects the back of your neck as well.

With a half zip suits you if you want to let some fresh air in at the neck quickly and regulate your temperature with the zip. This style is often called a "Half Zip".

With a high neck suits you if you want a little extra protection around the neck. The advantage of a high neck compared with a half zip is that there is no zip to rub or stick out.

With a regular neckline suits you if you want a base layer for every occasion. There is nothing to rub or feel tight around the neck, and if you want extra warmth at the neck one day, you can add a neck gaiter or similar. This makes it a good choice if the base layer will be your all-round option.