The difficult heat balance.

If you want to stay warm outside, in cold weather, it can often be enough to remember 2-3 layers of clothing, preferably a lot of wool - and a wind- and water-repellent garment on top of it all. Wow, you're quite warm - and especially if you also remember to take care of your head, hands and feet.

But what happens if you run, walk uphill, or take a really long walk? Trying a little hard? The most typical surprise is that it can get uncomfortably cold. When the terrain varies, and the intensity of your movements gradually decreases, the sweat will cool down from the outside, and the excess heat (sweat) will simply become cold.

Do you recognise your self? You sit down to take a break, and discover that your clothes have not been able to transport the excess heat through all the layers quickly enough. It was fine as long as you were at a steady, high level of activity, but as soon as you slowed down, the cold came.

Our advice is that you wear wool in several layers when it's cold outside. Lanullva's special knitting method, with extra breathing holes knitted into the wool, means that the garments breathe better. The uneven surface in the garment also means that less sweat is absorbed into the wool, and more excess heat flows out to the outermost layer.

But - to hold on hero dry is difficult, especially if you run at a high intensity. The expensive anorak, or another outer garment, can also destroy the good heat balance. If the garment is super-windproof and 100% water-repellent, the breathing properties are often far too poor.

Many also opt for more breathable outerwear (a bit of cotton in the anorak or windbreaker, for example), and put a denser outerwear in the rucksack, just in case.

Try yourself out. Two layers of wool and an outer garment adapted to the weather and activity level are the golden recipe for many.