What to wear under a wool jumper
Oct 06, 2026
Short answer: Under a wool jumper you need a soft, smooth layer that lies flat against the skin. That way you avoid itching, and the jumper can do its job on top. A T-shirt in an even fabric is the simplest solution, and it makes it easy to adjust the warmth.
Why wool can itch
Wool jumpers are made of fibres that can feel coarse against the skin, especially at the neck, wrists and forearms. Some people notice nothing, while others feel it straight away. This is completely normal, and a small barrier between jumper and skin usually solves the problem.
The T-shirt as a barrier
A T-shirt with long sleeves covers the arms and protects the skin from the surface of the jumper. Choose a model in a soft fabric without coarse seams, so it does not become an irritation itself. Look at bamboo T-shirts for men if you want to try a soft layer closest to the body.
The fit must be even
Under a thick jumper the T-shirt should lie flat and not gather into folds. If it is too big, it rolls up under the arms and at the waist, and that can chafe all day. Choose a fit that is a little close but not tight, so you can move freely.
Length and neckline
The T-shirt should be long enough that it does not ride up under the jumper when you reach forward. Choose a neckline that does not show over the edge of the jumper, unless you want it as a visible layer. A crew neck is the most common choice under most jumpers.
Underwear matters too
Thick jumpers give warmth, and then it is nice when your underwear sits softly and without visible seams. You can choose bamboo boxer briefs, which sit comfortably without chafing at the waist. It is a small part of the whole, but it counts when you wear the clothes for many hours.
An alternative to wool for everyday
If you cannot stand wearing wool, a soft sweatshirt is another option for cold days. It has a smoother surface and can be worn with nothing underneath, if you like. See bamboo sweatshirt for men and compare it with the wool jumper you already own.
Keep the wool jumper looking good
Wash the wool jumper according to the care label, often gently at a low temperature, and lay it flat to dry so it keeps its shape. If it is not dirty, it does not need washing every time, since wool can often be aired. The T-shirt underneath is washed more often and keeps the jumper fresh.
Frequently asked questions
Should I wear a T-shirt under a wool jumper?
It is a good idea if the jumper itches or you want to keep it cleaner. A layer of soft fabric closest to the skin makes the jumper more comfortable to wear all day.
Does it have to be a long sleeve T-shirt?
Not necessarily. A short sleeve T-shirt protects the upper body, but a long sleeve one also covers the arms. Choose according to where you feel the itch most and how cold it is.
Why does the T-shirt bunch up under the jumper?
Usually because it is too big or too short. Choose a fit that lies flat and a length that stays in place when you move.
You can find the full range at Copenhagen Bamboo.