For rapid weather changes in the Alps, you need light layers that combine well: a quick-drying Baselayer, a regulating Midlayer, wind protection within easy reach, a compact warm layer and, if there is a risk of rain, a waterproof outer layer. Adjust your layers early, not only once you are already overheated or cold.
Plan for the least favorable section
The weather at the starting point says little about the summit, the ridge or the shady north side. Altitude, wind and precipitation can change the perceived temperature dramatically.
Base the reserve in your backpack on the most exposed section and on the time you would have to spend outside in an emergency.
In the sun: release heat
Wear light, breathable clothing and protect your skin, head and eyes from UV radiation. Open vents and remove unnecessary layers early.
A sweaty shirt quickly turns into a cold factor with the next gust of wind.
In the wind: stop convection
A thin wind layer can significantly reduce heat loss. It is often quicker to put on and more breathable than a heavy weather jacket.
Put on wind protection before an exposed ridge, not only after you start to freeze.
In the rain: protect reliably
Persistent precipitation calls for a waterproof outer layer. Make sure it fits over the layers you already wear and keeps your freedom of movement.
Even the best membrane cannot immediately transport all the moisture produced during high exertion to the outside. Reduce unnecessary heat underneath.
In the cold and during breaks: insulate
A compact insulated jacket retains body heat. It belongs at the top of your backpack, within easy reach.
Also protect your head and hands. Small accessories provide a lot of warmth relative to their weight and pack size.
The order in your backpack is part of the system
Layering does not end with getting dressed. A Top Layer against wind or precipitation has to be easier to reach than a spare item that is only needed in an emergency. In uncertain weather, gloves and headwear also belong at the top.
Pack sensitive warm or spare clothing protected from moisture. That way, the reserve stays ready to use even if the rest of the backpack gets damp.
Conclusion
An alpine outfit must be adaptable within a few minutes. Baselayer, wind protection, insulation and weather protection fulfill separate tasks and are only combined when they are needed.
Frequently asked questions
Where do protective jackets go in the backpack?
Where you can reach them quickly without unpacking everything.
Can a hardshell also serve as wind protection?
Yes. In dry conditions at high intensity, however, it can be warmer and less comfortable than a light wind jacket.
What is more important: the weather forecast or clothing?
Both. A good weather forecast reduces surprises, but does not replace an adequate reserve.
When should I change a layer?
Early: before heavy sweating, before exposed sections and before longer breaks.
