On a ski tour, a single outing takes you from intense effort on the ascent to rapid cooling when you stop, then exposure to wind or cold on the descent. Your clothing should therefore do more than keep you warm: above all, it needs to adapt.
The short answer: climb in a breathable base layer with suitable wind protection; keep insulation that is easy to put on for transitions, and a waterproof or highly protective jacket for the descent when conditions demand it.
On the ascent: avoid starting too warm
Climbing generates a lot of heat. A breathable base layer needs to manage perspiration without restricting movement under your pack. A long-sleeved merino top such as the MEFONNA is a sensible starting point on cold mornings. Then adapt with a very light layer or a wind-resistant jacket if the wind picks up.
The most common mistake is keeping thick insulation on during the ascent: moisture can build up and become uncomfortable as soon as you stop moving. It is better to unzip, remove or stow a layer at the right moment than to reach the transition in damp clothing.
During transitions: keep a warm layer within easy reach
Your body cools quickly when you remove your skins, wait for a partner or prepare for the descent. An active fleece such as the KOKANEE or a lightweight insulating layer can be worn over your next-to-skin layer before setting off again. Accessibility is key: keep this piece in an easy-to-reach spot at the top of your pack, not buried at the bottom.
On the descent: protection from wind, snow and exposure
The descent generally combines speed, increased wind chill and reduced exertion. A hardshell becomes useful when snow, moisture or wind are present. The LONAK illustrates the role of this third layer: protecting the layering system while allowing the midlayers to provide insulation.
A simple layering system for a typical outing
- Next to your skin: a breathable, close-fitting base layer that feels comfortable under your pack.
- At the top of your pack: a fleece or lightweight insulating layer for transitions.
- Depending on conditions: a hardshell for snow, wind and moisture; warmer insulation for long stops or low temperatures.
How the weather changes your layering choices
In very cold weather, carry more insulation, especially for breaks and the descent. In wet weather or heavy snow, prioritise a truly protective outer layer. In dry, calm conditions, a lighter system may be enough, but a warm backup layer remains essential.
For more detail, read our guide to dressing for the cold and our page on the three-layer system.
In summary
When ski touring, do not dress simply for the temperature at the start: dress for all three phases of the outing. A breathable base layer for climbing, accessible insulation for transitions and outer protection for the descent: this adaptability is what keeps you comfortable and safe.