Late October is when layering starts making sense again. Mornings in Pune, Bengaluru and Delhi turn cool, offices crank the AC, and an open shirt over a t-shirt suddenly feels right. Most men get the shirt right and the t-shirt underneath wrong. At Thomas Scott, it's one of the styling questions we're asked most often once the weather turns.
This guide covers exactly which t shirt for men to wear under a shirt: the neckline, the fabric weight (GSM), the colour and the fit. It applies whether the top layer is an open casual shirt, an overshirt or one of Thomas Scott's shackets.
Crew Neck or V-Neck Under a Shirt?
Wear a crew neck t-shirt under an open shirt and a deep V-neck only under a buttoned formal shirt. When the outer shirt is open, the crew neckline frames the collarbone and looks deliberate. Under a buttoned shirt, a crew neck shows at the collar, and a V-neck keeps it invisible.
|
Outer layer |
Best t-shirt neckline |
Why |
|---|---|---|
|
Open casual shirt |
Crew neck |
Clean line, looks intentional |
|
Shacket or overshirt |
Crew neck or Henley |
Matches the heavier outer layer |
|
Buttoned formal shirt |
Deep V-neck |
Stays hidden under the collar |
|
Open shirt, top two buttons |
Crew neck |
A V-neck under an open collar looks dated |
What GSM Should a Layering T-Shirt Be?
A layering t-shirt should be mid-weight, around 160 to 200 GSM. Below that, the t-shirt can cling and show seams through the outer shirt. Above about 220 GSM, the t-shirt becomes bulky under a shirt and gets warm indoors. GSM (grams per square metre) measures fabric weight, and most brands list it on the product page.
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Under 150 GSM: too thin. It clings and shows sweat.
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160 to 200 GSM: ideal for layering under shirts and overshirts.
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220 GSM and above: better worn alone, or under a light jacket in real winter.
Which T-Shirt Colours Work Under Shirts?
White, grey marl, black and navy t-shirts work under almost any shirt. The rule is contrast: pick a t-shirt that's clearly lighter or clearly darker than the outer shirt, never the same mid-tone. A white t-shirt under a navy or olive shirt is the safest pairing, and a black t-shirt under a beige or grey shirt is the sharpest.
Fit: The T-Shirt Should Be Shorter and Closer
The t-shirt under a shirt should fit closer to the body and end slightly above the outer shirt's hem. A t-shirt hanging below an open shirt looks untidy. Regular-fit t-shirts work best for layering. Skip oversized t-shirts under shirts unless the outer layer is also oversized.
Three Easy Layering Outfits for Late October
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White crew neck, open olive shirt, dark jeans and white sneakers. The everyday weekend look.
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Black crew neck, beige shacket, straight-fit jeans. Smart casual for evenings out.
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Grey crew neck, open checked shirt, chinos. Easy for a casual Friday at the office.
FAQs: T-Shirts for Men Under Shirts
Should I wear a t-shirt under a formal shirt?
Yes, if the room will be warm or the shirt is light-coloured. Choose a thin, close-fitting V-neck t-shirt in white, grey or a skin-close shade so it stays invisible at the collar and doesn't show through the shirt. It absorbs sweat and keeps the formal shirt cleaner for longer.
What is the best t-shirt colour to wear under a white shirt?
A light grey or skin-tone t-shirt is the best choice under a white shirt. A white t-shirt under a white shirt often shows its outline more clearly than you'd expect, especially in photos and bright light.
Can I wear a printed t-shirt under an open shirt?
Yes, if the outer shirt is a plain solid colour. A small graphic or a textured t-shirt under a solid open shirt works for casual plans. Avoid printed t-shirts under checked or printed shirts, because the patterns compete.
Conclusion
The right t-shirt under a shirt is a mid-weight crew neck in a contrasting colour that ends just above the shirt's hem. Get those four things right and every layered outfit looks deliberate. Browse Thomas Scott's t-shirts for men and textured t-shirts, build your layering base for the season, and wear with intent.