Joybuy Insights

Choosing men’s underwear: how to find the right fit, fabric and multipack

A new set of men’s underwear might seem simple to pick, but small differences in fit, material and waistband make all the difference to how comfortable you feel. A low price doesn’t automatically mean good value, and a well-known brand name is no guarantee that a style will suit your body or how you’ll wear it.

Women looking for women’s briefs or Calvin Klein bikini briefs can use the same pointers. Always focus on the product specifications, not just the photos or marketing copy.

Common pitfalls when buying underwear

1. Only looking at the brand name or price

Calvin Klein underwear, Reebok underwear, Lee underwear and Wrangler underwear each come in different styles. One brand can offer several fits: from low rise to mid rise, and from close-fitting trunks to a roomier cut. So always compare:

  • The exact size and available size guide.
  • The cut: brief, trunk or longer boxer short.
  • The fabric composition.
  • The number of pieces per pack.
  • The washing and drying instructions.

A multipack of underwear can be good value if all the colours and sizes work with your wardrobe. A multi-piece pack is less practical if the fit turns out to be wrong.

2. Confusing “breathable” with a fixed material property

Words like soft, breathable and moisture-wicking often appear in product descriptions. So check which fibres are actually used. Cotton feels comfortable for many people, while elastane provides stretch and freedom of movement. Polyester can make the fabric light and flexible, but the feel varies depending on the weave and style.

According to the product description of some styles, a moisture-wicking effect is mentioned. Treat this as information from the brand, not a universal guarantee. For everyday wear, cotton men’s underwear can be a logical choice; for sport, flexibility, a firm waistband and a good fit are at least as important.

3. Reading the size without checking the cut

An S, M or L is not the same across every style. Measure your waist according to the instructions on the product page and compare it with the size guide. Also pay attention to the difference between:

  • Men’s boxer shorts: usually longer on the thigh.
  • Men’s trunks: shorter and often close-fitting.
  • Boxer shorts with a low-rise fit: sit lower on the hips.
  • Men’s sports underwear: often designed with extra freedom of movement and support.

A waistband should be firm enough not to slip down, but must not pinch or roll over. When in doubt, the size guide is more important than the letter on the label.

The key specifications to compare

Material and stretch

Check the percentage of cotton, polyester, modal and elastane. A blend with elastane can help with the fit, especially when moving. Modal is combined with cotton in some products for a smooth feel. Always check the full composition; terms like “cotton stretch” don’t automatically describe the same material percentage.

Waistband and construction

A flexible waistband can be comfortable for everyday wear and sport. Check whether the product description mentions an elasticated band, logo elastic, flat seams or a lined fly. These details are more verifiable than general claims about comfort.

Number of pieces and care

With three- or five-packs, the price per piece is often easier to compare. Also look at the washing instructions. Several Reebok styles in the range are machine washable, but also state: do not bleach, do not tumble dry and iron on a low temperature. The product information and the label inside the garment are what you should follow.

Our recommendations by use profile

Suitable for: Budget-conscious beginners
Reebok RBK Sports Trunks Baird 5-pack

Reebok RBK SPORTS TRUNKS BAIRD – 5-pack

Why this fits the profile: The pack contains five trunks in black, charcoal and white. That makes this style practical when you want to buy several everyday pairs.

How this product avoids the pitfall

The number of pieces and the colour breakdown are clearly stated. This lets you compare the price per piece instead of just looking at the offer price.

Key benefit & highlights

5-pack; elasticated waistband; machine washable according to the product description.

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: This style has a slim fit, a cotton-elastane blend and three neutral colours: black, white and grey.

How this product avoids the pitfall

The fit, pack contents and colours are described in detail. Just check before buying whether a slim fit suits your preference.

Key benefit & highlights

3-pack; cotton with elastane; seamless Infinity Bond waistband according to the product information.

Suitable for: Specific use & intensive users
Reebok Sports Trunks Jay

Reebok Sports Trunks Jay

Why this fits the profile: The product description mentions a soft, smooth finish, a flexible waistband and a composition of 57% cotton, 38% polyester and 5% elastane.

How this product avoids the pitfall

The material percentages are specified. This lets you weigh up the fabric against your activity and personal preference.

Key benefit & highlights

Cotton-polyester-elastane blend; 3-pack; suitable according to the product description for everyday wear and physical activity.

Suitable for: Those looking for women’s underwear
Calvin Klein 3 Pack Bikini Briefs Icon Logo

Calvin Klein 3 Pack Bikini Briefs – Icon Logo

Why this fits the profile: These women’s briefs are available as a 3-pack in black, grey and white, with a cotton-stretch blend and a mid-rise style.

How this product avoids the pitfall

The size, colours and blend can be checked in advance. Also check your hip and waist measurements against the size guide before buying.

Key benefit & highlights

3-pack; cotton-stretch blend; lined gusset and mid-rise fit according to the product description.

Looking for more options?

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

Frequently asked questions about men’s underwear

How do I determine the right size for men’s boxer shorts?

Measure your waist or hip circumference where the waistband will sit. Compare the measurement with the size guide for the specific product. Also look at the fit: a trunk fits differently from a longer boxer. A size that works well in one brand may come up differently in another style.

How long does men’s underwear last?

The lifespan depends on how often you wear it, the material, friction and care. Wash according to the care label, do not use bleach when it’s advised against, and avoid the tumble dryer if the product information says so. A multipack helps you rotate several pairs, so each one is worn less often in a row.

Is cotton suitable for men’s sports underwear?

Cotton can be comfortable for everyday wear, but for sport, drying time, stretch and freedom of movement also matter. So compare cotton with blends that include polyester and elastane. Choose based on the product composition, the waistband and how you intend to use the underwear.