Layering assistant
Layering works best when you know which layer you actually need. The assistant asks about temperature, effort and weather. You get a recommendation for your base, mid and outer layer.
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How the calculation works
Moving makes heat, so the assistant works with a felt load: for hard activity it adds 7 degrees to the air temperature, for easy activity it takes off 3 degrees. These values are our rule of thumb.
Below a felt 5 degrees it suggests a warm base layer, otherwise a light one. Below minus 5 degrees it adds an insulated jacket; up to 15 degrees, fleece or light insulation is enough. The outer layer depends on the weather: a hardshell in rain or snow, a softshell in wind, otherwise a light wind jacket in your pack.
How to read the result
The headline tells you what to wear. The outer layer is listed below because you often only put it on when you need it.
Start slightly cool: ten minutes in, you will be warmer. Breaks are when the extra layer goes on.
Frequently asked questions
Merino or synthetic base layer?
Merino smells less after several days and still keeps you warm when damp. Synthetic dries faster and is tougher. Both work; cotton does not.
What is the difference between hardshell and softshell?
A hardshell is waterproof and windproof. A softshell is usually windproof, stretchy and more breathable, but only keeps out light rain.
Do I need layers in summer?
In the mountains, yes. It gets colder as you climb and the weather can turn quickly. A light jacket in your pack weighs very little.