Choose for the activity, not for the degrees
Short answer: Ten degrees while sitting still needs more clothes than ten degrees while moving. The body produces heat when you walk, and that shifts the limit. Choose clothes by what you are going to do, not only by what the thermometer says.
Why movement changes everything
Muscles give off heat when they work. If you walk or cycle, you get warmer than the temperature alone suggests, and an extra layer quickly becomes too much. Sitting still, the body gets no help, and the cold gets in faster. That is why the same day can call for two very different outfits.
The seated day
On a seated day, wear one layer more than you think, especially on feet and hands. Those are the parts that go cold first when you do not move. Pick clothes that fit close enough to hold warmth without feeling tight. See bamboo socks for men.
The active day
On an active day, wear one layer less and pick an inner layer that moves moisture away from the skin. That way you avoid getting clammy when you warm up. Starting a little cool is fine, since the body warms up after a few minutes. See bamboo undershirt for men and bamboo t-shirts for men.
How much movement is worth
That has not been measured here, and it depends on you, the pace and the weather. The best way to find out is to try it yourself. Pick a cold day and go for a walk with and without the extra layer. Note when you start to sweat, and use that next time.
A day with both
If you have to sit and move on the same day, dress for the sitting and take a layer off when you walk. That works better than dressing for the movement and freezing when you sit. If you have a bag, the layer can simply stay in it until you need it again.
Why you freeze most when sitting still
You feel the cold most when sitting still because the muscles are not producing heat. The body then has only the clothes to hold on to its warmth. That is why a cold office day often feels worse than a cold walk, even at the same temperature.
Start with the outer parts
Feet and hands lose warmth first when you sit still. Consider a second pair of socks or a thicker pair before thinking of an extra layer on the body. It is a simple adjustment that often makes a big difference to how the whole body feels.
How to choose in practice
Ask yourself what you will be doing in the next few hours before looking at the degrees. If you will sit, dress warm. If you will walk, dress lighter. If it is both, choose layers that go on and off. It is a simple rule that works most days.
Frequently asked questions
How much is movement worth?
It has not been measured here. Try it yourself on a cold day with and without a walk, and see when you start to feel warm. That is the most honest way to find out.
What about a day with both?
Dress for the sitting and take a layer off when you walk. That way you avoid freezing when you sit and getting too warm when you move.
Why do you freeze most when sitting still?
Because muscles do not produce heat when they are not working. The body then has only the clothes to hold its warmth, so the cold is felt sooner than when you are on the move.
You can find the full range at Bamboo-Clothing.com.
