What to expect from a bamboo undershirt
Short answer: A bamboo undershirt fits close, feels smooth under a shirt and helps keep moisture away from the skin. Over time it becomes a little softer and more giving, and the neckline and armholes are where use shows first.
What an undershirt should do
An undershirt is worn close to the body under a shirt, a jumper or a uniform. It should lie smoothly without creases, absorb some moisture and be thin enough not to show through the outer layer. An undershirt made from bamboo viscose is often knitted with a little elastane so it follows the body. The smooth surface lets the shirt glide over it easily, which reduces bunching at the waist during the day. See bamboo undershirt for men in V-neck and crew neck.
Fit over time
Because the undershirt fits close, the fabric is stretched all day. Over time it can become slightly longer and wider, especially if it hangs wet on a hanger. Viscose can also shrink in a hot wash. Both are best avoided by washing at 30 to 40 degrees and drying flat or over a rack. An undershirt that has relaxed a little is still perfectly usable, but it will not lie quite as smoothly as when it was new.
Neckline and armholes
The neck edge is the first part to show wear, because it is stretched every time the shirt goes on and off. A V-neck can start to ripple a little, and a crew neck can loosen. The armholes take friction from the arms and can become thinner. Take the shirt off by gripping the back, and wash it inside out. That way the edges hold their shape for longer and the shirt keeps a neat line under your clothes.
Sweat and colour under the arms
An undershirt absorbs a fair amount of sweat, and over time yellowish marks can appear under the arms on light colours. This is often caused by a combination of sweat and deodorant settling in the fibres. Wash the undershirt after each wear and let deodorant dry fully before putting it on. Bleach should not be used on viscose, as it weakens the fibres. If you sweat heavily, talk to your doctor.
Washing and rotation
An undershirt is washed often, and washing causes most of the wear. Use a mild detergent and avoid fabric softener, which can reduce the fabric's ability to absorb moisture. Let it air dry. Having several undershirts in rotation spreads the wear, so each one lasts longer. Many people choose popular styles among the bestsellers for men, which makes it easy to buy several identical ones.
When it is worn out
An undershirt is worn out when the neckline no longer lies flat, when the fabric turns thin or see-through, or when marks under the arms no longer wash out. How quickly that happens depends on how often it is worn and washed. Undershirts are everyday basics, and it is natural to replace them regularly. See also brands such as Resteröds.
Frequently asked questions
Can a bamboo undershirt be seen through a shirt
A thin undershirt in skin tone or light grey is least visible under a white shirt. A white undershirt tends to show more clearly.
How do I avoid yellow marks
Let deodorant dry before putting the shirt on, and wash it after each wear at the temperature on the label.
Does a bamboo undershirt shrink
It can shrink slightly with hot washes and tumble drying. Wash at a low temperature and air dry it.
See our range of women's bamboo undershirts.
