Joybuy Insights

Buying Men’s T-shirts and Underwear: How to Choose Comfort, Fit and Fabric

Buying a new T-shirt or underwear might seem straightforward. Yet mistakes often lie in details that only become apparent after a few washes. A neckline that stretches out, a fabric that feels too warm, or a waistband that digs in can quickly turn a bargain into an impractical purchase.

When it comes to men’s T-shirts and underwear, these are the main pitfalls to watch out for:

  • Relying solely on the brand: a well-known name doesn’t automatically mean the fit or fabric composition will suit your needs.
  • Choosing a size without checking the size guide: a medium can vary between brands and styles. Always look at chest, waist or hip measurements rather than just the letter size.
  • Confusing marketing claims with guarantees: terms like “breathable”, “quick-drying” or “odour control” are only useful if the product description also gives details about the material and intended use.
  • Skipping care instructions: washing at the wrong temperature, using fabric softener or a hot tumble dryer can affect the shape and elasticity more quickly.

The key specifications for men’s T-shirts and underwear

1. Fabric: cotton, blend or elastic fibres?

A cotton men’s T-shirt generally feels soft and is suitable for everyday wear. A fully cotton shirt, such as the GANT models in this selection, is made from 100% cotton according to the product information. That’s straightforward, but always check the care label: depending on the weave, cotton can shrink or stay damp for longer.

A cotton-polyester blend can be more practical for sport or training. The Under Armour Sportstyle models are made from 60% cotton and 40% polyester according to the product description. Under Armour states the fabric is lightweight, quick-drying and designed to wick moisture during activity. These are brand claims; the actual experience also depends on your level of exertion, temperature and fit.

For trunks, stretch is important for freedom of movement. The Calvin Klein Low Rise Trunk 3PK is listed with 64% lyocell, 28% polyester and 8% elastane. Note: the description sometimes mentions a cotton-like blend, but the stated fabric composition lists these fibres. Always check the composition on the product page and the physical label.

2. Fit and sizing

Don’t choose a men’s short-sleeve T-shirt or men’s long-sleeve T-shirt based solely on your usual size. Pay attention to:

  • Regular fit: a straight cut with room around the chest and waist.
  • Low rise: a lower cut that sits on the hips, as with the Calvin Klein trunks.
  • Chest circumference: often the most useful measurement to compare for shirts.
  • Waist and hip circumference: relevant for men’s trunks and other underwear.
  • Sleeve length: a long sleeve is handy as an extra layer, but can feel warmer during intense movement.

The Under Armour Sportstyle T-shirts are described in the product information as regular fit and true to size. The stated chest measurement for size L is around 104–112 cm, while size M is listed at around 94–104 cm. Use the size chart as a check, especially if you’re between two sizes.

3. Use case and care

A men’s vest should not be too thick under a shirt or jumper, and ideally have a neckline that won’t show. A crew neck, like the GANT Underwear T-Shirts, is suitable for wearing on its own or as a base layer.

For training, lightweight material, freedom of movement and care are more important than appearance alone. With the Under Armour shirts, it’s recommended to wash the garment inside out and with similar colours. The product information also advises cold washing, low tumble drying and no fabric softener. Always follow the label on the specific item.

Our recommendations by user type

Suitable for: Budget-conscious beginners
GANT Men Underwear T-Shirt Gant M

GANT Men Underwear T-Shirt Gant M

Why this suits the profile: A simple crew-neck style for everyday wear, on its own or under a shirt. The product information states 100% cotton and a lightweight construction.

How this product avoids the pitfall

The fabric composition is clearly stated, so you don’t have to rely on a marketing term alone. Do check the size and care label.

Key benefit & highlights

100% cotton; crew neck; suitable as a layer under shirts or jumpers.

Suitable for: Shoppers seeking top quality
Calvin Klein Low Rise Trunk 3PK FZ7

Calvin Klein Low Rise Trunk 3PK, FZ7

Why this suits the profile: This pack contains three trunks in Black, Blue Shadow and Grey Sky. The low-rise style is designed for those looking for a shorter cut with stretchy fabric.

How this product avoids the pitfall

The product details mention the low rise, stretch and sizing. This allows you to check beforehand whether this style suits your preference and body measurements.

Key benefit & highlights

3-pack; 8% elastane according to the product information; machine wash at 30 °C.

Suitable for: Specific use & intensive users
Under Armour Men's T-Shirt Short Sleeve Black Sportstyle Collection L

Under Armour Men's T-Shirt Short Sleeve Black Sportstyle Collection L

Why this suits the profile: A men’s sports T-shirt for training, workouts and casual wear. According to Under Armour, the cotton-polyester blend is lightweight, quick-drying and has a regular fit.

How this product avoids the pitfall

The blend, fit and care instructions are specified. This allows you to compare the shirt on practical features rather than just its sporty appearance.

Key benefit & highlights

60% cotton and 40% polyester; short sleeve; sizes from S to XXL within the stated models.

When should you choose a long sleeve?

A men’s long-sleeve T-shirt works as an extra layer on cooler days, for commuting or outdoor training. The Under Armour Men's T-Shirt Long Sleeve White Sportstyle Collection is made from 60% cotton and 40% polyester according to the product details, and has a regular fit. The white style can be worn under a jacket or gilet, but watch out for show-through with thinner outer layers.

For a classic cotton style, you can also take a look at the GANT Men Underwear T-Shirt Gant L. If you’re after a black basic men’s garment, you can compare the Calvin Klein CK Essential Regular Crew Neck. According to the product information, this shirt is made from 100% cotton and has a regular fit.

Looking for more options?

We’ve put together a full, up-to-date list of products that fully meet these strict selection criteria and current European safety regulations.

Frequently asked questions about men’s T-shirts and underwear

How do I determine the right size for a men’s T-shirt?

Measure your chest circumference at the widest point and compare it with the brand’s size guide. For underwear, waist and hips are more important. If you’re between two sizes, also check whether the style is regular, slim or low rise.

Is cotton suitable as a vest?

Yes, a cotton men’s T-shirt is suitable as a vest for many everyday situations. Cotton feels soft, but can hold moisture longer than a synthetic blend. For intensive training, a blend with polyester can dry more quickly according to the product description.

How long does men’s underwear last?

The lifespan depends on how often it’s worn, washing, drying and the elasticity of the fabric. Wash according to the label, avoid unnecessarily high temperatures and don’t use a tumble dryer when it’s not recommended. Pay particular attention to the waistband and seams; when they lose their shape, replacing them is more practical than trying to adjust them.