How an undershirt should fit on the body
Short answer: Undershirts for men should fit closely enough to lie smoothly under the outer layer, but not so tight that they press or pull. Shoulders, neckline and length decide whether it feels right, and you notice quickly when you move.
How undershirts for men should fit
Good undershirts for men lie close to the body without squeezing, and they stay in place all day. You should be able to lift your arms, bend and sit down without the fabric riding up or rolling. If you feel the undershirt all day, it does not fit.
Shoulders and armholes
The seam at the shoulders should sit on top of the shoulder, not down the upper arm or in toward the neck. If it is too wide, the undershirt hangs, and if it is too narrow, it pulls. Feel whether the armhole cuts in. You can try a bamboo undershirt for men with a jacket over it to see whether it moves with you.
Neckline and collar
The neckline should lie evenly around the neck without tightening and without forming a wave. If it sits too high, it can peek out over the collar, and if it sits too low, you lose the point of an extra layer. Choose a crew neck or V-neck to suit the shirts and sweaters you wear most.
Length on the body and in the trousers
An undershirt should reach well below the waistband so it does not creep up when you reach or sit down. If it is too long, it can bunch up under the trousers, and that is easy to see. Try it with the trousers you wear every week and check the length standing and sitting.
Chest and stomach
Around the chest and stomach, the fabric should lie flat without pulling or gaping. If it is too tight, it can restrict your breathing and show under a thin shirt. If it is too loose, it forms creases. Measuring around your chest and comparing with the size chart makes it easier to find your size.
What the fabric does to the fit
Stretchy fabrics give a little, while stiff fabrics hold their shape. Bamboo in clothing is viscose made from bamboo and is often soft with a slight drape, so it follows the body. That does not mean one size too small is fine. Choose the size you can wear all day.
When it is worn with other pieces
If the undershirt goes under a T-shirt, choose a model a little thinner than the T-shirt. bamboo T-shirts for men come in several cuts, so check how the two pieces work together. If you need warm feet, bamboo socks for men can be the next step to a complete layer.
After washing, the shape holds best if you go gently
Wash the undershirt by the label and avoid high heat so it does not shrink. Do not wring it out hard, and lay it flat to dry if you have time. If the size changes after washing, try another size next time or wash at a lower temperature.
Frequently asked questions
Should an undershirt be a little tight?
It should fit closely enough to lie smoothly, but not so tight that it presses or restricts you. If you can move freely all day, the fit is good.
What do I do if the undershirt creeps up into the trousers?
Choose a longer model or check whether the size is too small. Try it sitting down and with your arms raised, so you can see whether it stays in place.
How do I find the size for undershirts for men?
Measure around the chest and compare with the size chart on the product. If you are between two sizes, choose by whether you like it close to the body or slightly looser.
