Joybuy Insights

Buying women’s and men’s underwear: how to choose comfortable, well-fitting underwear

When it comes to women’s and men’s underwear, it is not just about colour or brand. You often only notice an incorrect size, stiff waistband or material that does not breathe well during a long day at work or a training session. Multipacks may seem good value, but a set is not a good buy if the fit is not right.

Joybuy Product Recommendation Officer therefore focuses mainly on verifiable details: material, sizing, style, care instructions and the number of items in each pack. This allows you to compare men’s boxer shorts, women’s briefs, cotton underwear and sports underwear on practical grounds.

Common pitfalls when buying underwear

1. Looking only at the size letter

An S, M or XL is not the same at every brand. Always check the waist and hip measurements in the product information. For example, the Utree model lists sizes M 160/90, L 165/95 and XL 170/100. Calvin Klein provides separate waist and hip ranges.

Also consider the style. Low-rise briefs, trunks and longer boxer shorts fit differently around the hips and legs, even when the letter size is the same.

2. Confusing marketing claims with measurable properties

Words such as “breathable”, “antibacterial” or “extra comfortable” only tell you something when it is clear which material, construction or specification supports the claim. According to Utree’s own product information, the model has an insert featuring “10A antibacterial cotton” and an extended gusset measuring 16 cm. This is brand-provided product information, not a general guarantee of hygiene or skin comfort.

When looking at breathable underwear, check the fibre composition, fabric thickness and whether elastane is included. A flexible construction can be useful for sport, but the product should also fit securely without feeling restrictive.

3. Buying a multipack without checking how it will be used

A 3-pack of underwear or another underwear multipack is practical for everyday laundry, but check beforehand whether all the items have the same colour and style combination. Also pay attention to the care instructions. Several Reebok and Wrangler models are machine washable, but state that bleaching, tumble drying and dry cleaning are not suitable.

The key specifications to compare

Material and stretch

Cotton feels familiar and is used in many everyday styles. A blend with elastane usually provides more stretch. For example, according to the product information, the Calvin Klein 3 Pack Bikini Briefs are made from 90% cotton and 10% elastane. The Reebok Carina women’s brief is listed as 95% cotton and 5% elastane.

For a smooth look under close-fitting clothing, you could consider seamless underwear. The Lee Seamless Brief Bella is listed as 92% nylon and 8% elastane. Synthetic fibres feel different from cotton, so do not just look for the word “seamless”; also check the washing instructions and the precise composition.

Fit and support

Check whether the waistband is flexible and whether the leg openings feel too tight. With trunks, leg length is important: a longer style may provide more coverage, while a shorter one means less fabric beneath your trousers.

For women, practical points to consider may include a fully lined gusset, high stretch and a smooth leg opening. Utree states that the three-pack offers approximately 200% stretch and an extended gusset. These are specifications from the product description; personal experience may vary depending on body shape.

Care and longevity

How long underwear lasts depends on how often it is worn, washed and dried, as well as its fibre composition. Always follow the care label. Many selected styles recommend machine washing at a low temperature, using no bleach and avoiding the tumble dryer. A low washing temperature can help preserve the shape and elasticity for longer, but the label for the specific product remains the definitive guide.

Wash new underwear before wearing it for the first time, and replace an item when the waistband remains stretched, seams start to come undone or the fabric becomes thin and misshapen. These are more useful indicators than a fixed replacement period.

Our recommendations by user profile

Suitable for: Budget-conscious beginners
Reebok RBK SPORTS TRUNKS MED BENJI-BLACK/ACID YELLOW PRINT/GREY-S

Reebok RBK SPORTS TRUNKS MED BENJI-BLACK/ACID YELLOW PRINT/GREY-S

Why it suits this profile: This men’s style is sold as a practical three-pack and is intended for everyday use, sport and an active lifestyle.

How this product avoids the pitfall

The pack contents and intended uses are clearly stated. However, check the available size before ordering.

Key benefit & advantages

3-pack; flexible waistband; according to the product description, suitable for everyday use and movement.

Suitable for: Shoppers looking for premium quality
Calvin Klein 3 Pack Bikini Briefs Icon Logo

Calvin Klein - 3 Pack Bikini Briefs - Icon Logo - Black, Grey, White 3XL

Why it suits this profile: These women’s briefs combine a clearly stated cotton-elastane ratio with a lined gusset and three neutral colours.

How this product avoids the pitfall

The composition of 90% cotton and 10% elastane is stated, so you do not have to rely solely on general comfort claims.

Key benefit & advantages

90% cotton; 10% elastane; fully lined gusset; 3-pack in black, grey and white.

Suitable for: Specific uses & intensive users
Reebok RBK SPORTS TRUNKS MED HINLO-GREY/WHITE/BLACK-L

Reebok RBK SPORTS TRUNKS MED HINLO-GREY/WHITE/BLACK-L

Why it suits this profile: The product description focuses on everyday use, sport and active pursuits, with a supportive fit and flexible waistband.

How this product avoids the pitfall

The set is not described solely as sportswear; its suitability for everyday use makes it more versatile. Care instructions remain important.

Key benefit & advantages

3-pack; breathable and flexible according to the product information; waistband with a supportive fit.

For women: modal, cotton or seamless?

If softness is your main priority, you can compare a modal style with traditional cotton. The Utree women’s modal triangle underwear is described as being made with beechwood modal and featuring a three-colour composition. According to Utree’s own product information, the model has a smooth leg opening, high stretch and an extended gusset. For size XL, check the stated body and size measurements before ordering.

For close-fitting clothing, a seamless style such as the Lee Seamless Brief Bella may be worth considering. The product information states that it contains nylon and elastane, has an elasticated waistband and should be washed at 30 °C. This makes it different from cotton underwear; the best choice depends on how it feels, how it fits and what you are wearing over it.

Looking for more options?

We have put together a complete, up-to-date list of products that fully meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about women’s and men’s underwear

How often should you replace your underwear?

There is no fixed timeframe that applies to everyone. Check the condition of the fabric, seams and waistband. With daily use and frequent washing, signs of wear may appear sooner. Replace an item when it no longer fits securely or becomes damaged.

What underwear is suitable for sport?

Choose a style with a firm but non-restrictive waistband, sufficient freedom of movement and a material described as breathable or flexible in the product information. Sports underwear should also stay securely in place while running, cycling or working out. Try a new style during a short activity first.

Is a multipack better value than individual briefs or boxer shorts?

A multipack can be practical when you need several identical styles. However, compare the price per item, size availability, material and care instructions. An inexpensive set is less appealing when the fit is not right for your body or intended use.