Joybuy Insights

Buying men’s underwear: how to choose the right fit, fabric and multipack

Good men’s underwear needs to be comfortable, stay in place and withstand regular washing. Yet it’s tricky to tell from a product photo alone whether a style will suit you. Marketing terms like “sporty”, “breathable” or “stretch” only really mean something when you also look at the fabric composition, fit and care instructions.

In this buying guide, you’ll discover what to look for when choosing men’s underwear, from men’s boxer shorts to trunks and hip briefs for men. We’ll also compare a few practical options for everyday wear, sport and larger sizes.

Three common pitfalls when buying men’s underwear

1. Choosing the wrong fit by only looking at the size letter

A size M isn’t the same across every brand. The waist width, rise height and leg length can all vary. An elastic waistband that’s too tight can dig in uncomfortably, while a boxer that’s too loose may shift around when you move.

Always check the following:

  • The stated waist size in centimetres.
  • Whether the style is low rise, regular waist or high rise.
  • Whether the fit is described as fitted, slim or relaxed.
  • Whether the size is available in your option, for example S, L, XL, XXL or 3XL.

With men’s underwear in larger sizes, the waist measurement is more important than just the size label. A product page with a concrete size guide helps you avoid ordering the wrong thing.

2. “Cotton” doesn’t always mean 100% cotton

Many cotton men’s underwear items are actually a cotton blend with elastane. That’s not automatically a bad thing: elastane can provide more stretch and a closer fit. The difference lies in the composition.

Pay attention to the percentage:

  • 100% cotton: generally feels soft and airy, but doesn’t stretch as much.
  • 95% cotton and 5% elastane: combines a cotton feel with stretch and support.
  • Cotton with polyester and elastane: can be practical for a flexible fit, but feels different to pure cotton.
  • Organic cotton: check whether the product actually states this in the material specification.

Don’t take a brand’s claim about moisture management as a guaranteed benefit. According to Calvin Klein’s own research, a plant-based water-repellent finish can support wearing comfort; the experience may vary from person to person.

3. Choosing a multipack without comparing the cost per item

A men’s underwear multipack is practical, but a larger number of pieces isn’t automatically better value. Compare the price per pair and check that all the pieces are the same colour, size and style.

A 3-pack of boxer shorts is handy if you want to try a fit first. A 5-pack of boxer shorts is better when you’re looking to stock up for everyday use. Also check the care instructions: some styles can’t go in the tumble dryer or need ironing on a low temperature.

The key specifications to consider

Fit: boxer shorts, trunks or hip briefs?

Men’s boxer shorts usually have longer legs and offer more coverage. They work well under jeans, chinos or sportswear, as long as the leg doesn’t ride up.

Men’s trunks are shorter than classic boxer shorts. They combine a close-fitting look with relatively little extra fabric, making them suitable for daily wear and movement.

Men’s hip briefs have short sides and cover less of the upper thigh. They’re a practical choice when you want a compact style with freedom of movement.

Fabric and stretch

For everyday use, cotton blends with around 5% elastane are a common choice. The fabric can then fit more closely and move with you. For sport, it’s not just the material that matters, but also the waistband, seams and leg length.

Look for concrete details rather than general wording:

  • Fabric composition in percentages.
  • Presence of elastane or stretch.
  • Type of waistband.
  • Washing and drying instructions.
  • Available colours and multipack contents.

Care and expected lifespan

How long your underwear lasts depends on how often you wear it, how you wash it, the temperature and drying method. Wash your underwear according to the label and avoid the tumble dryer if it’s not recommended. Calvin Klein advises machine washing some styles at 30 °C and not tumble drying. Reebok styles mention, among other things, not bleaching and ironing on a low temperature.

A sturdy waistband and reinforced seams are useful product specifications, but they don’t guarantee that an item will last the same length of time in all conditions.

Our recommendations by usage profile

Suitable for: Budget-conscious beginners
Urban Classics Solid Organic Cotton Boxer Shorts 5-Pack Underwear

Urban Classics Solid Organic Cotton Boxer Shorts 5-Pack

Why this fits the profile: A five-piece set in black is practical if you want to top up your basic wardrobe in one go.

How this product avoids the pitfall

The product information states a 5-pack, slim fit and 95% organic cotton with 5% elastane. This means you can check the set contents and fabric in advance.

Key benefit & highlights

Five pieces, black colourway and stretch in the fabric.

Suitable for: Shoppers looking for top quality
Calvin Klein 3-Pack Slim Boxers Icon Cotton Stretch

Calvin Klein 3-Pack Slim Boxers – Icon Cotton Stretch

Why this fits the profile: Ideal if you’re after a close-fitting boxer in three neutral colours for work and leisure.

How this product avoids the pitfall

The composition states cotton with elastane and the pack contains black, white and grey. The care instructions mention 30 °C and no tumble drying.

Key benefit & highlights

Slim fit, cotton-stretch and three easy-to-match colours.

Suitable for: Specific use & heavy users
Reebok Sports Trunks 3-pack

Reebok Sports Trunks 3-pack

Why this fits the profile: A practical choice for daily movement, sport or an active working day.

How this product avoids the pitfall

The product description mentions a flexible waistband, freedom of movement and a 3-pack. The care instructions state: machine wash, do not bleach and do not tumble dry.

Key benefit & highlights

Supportive fit and flexible waistband for active use.

Suitable for: Those who need extra size options
Urban Classics Organic Boxer Shorts 5-Pack 3XL

Urban Classics Organic Boxer Shorts 5-Pack 3XL

Why this fits the profile: This option is aimed at shoppers looking for a multipack in a larger size and a black colour.

How this product avoids the pitfall

The product name explicitly states 3XL and the product information mentions five black boxers. Do check the current size guide before purchasing.

Key benefit & highlights

5-pack, black colourway and size 3XL.

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 underwear

How often should you replace men’s underwear?

That depends on how often you wear it, how many pairs you have and how you care for it. Replace a pair when the elastic waistband is permanently loose, the fabric becomes thin or the seams start to come apart. A multipack can help spread the wear across each pair.

Is cotton or stretch men’s underwear more suitable?

For everyday wear, many men choose a cotton blend with elastane, because that combination offers softness and stretch. Stretch men’s underwear can be comfortable for movement, but always check the percentage of elastane and the stated fit. If you prefer a less close-fitting feel, it’s better to look for a relaxed fit.

Which colour of men’s underwear is practical?

Black men’s underwear is easy to match and less prone to visible discolouration from daily wear. White can be handy under light-coloured clothing, while multipacks with several colours offer more variety. Focus mainly on the fabric, fit and size; colour doesn’t affect wearing comfort.