Joybuy Insights

Buying underwear: how to choose comfortable, breathable and practical underwear

A new pair of underwear may seem like a simple purchase, but small differences in material, sizing and finish determine how comfortable it feels day to day. A waistband that is too tight, seams that show through or fabric that loses its shape after a few washes can quickly make a multipack less worthwhile.

This buying guide helps you compare women’s underwear, men’s underwear and disposable underwear based on verifiable product specifications. That way, you are not relying solely on terms such as “extra soft”, “antibacterial” or “breathable”.

Common underwear pitfalls

1. Looking only at the size on the label

A size M is not the same for every brand. One size guide may use waist measurements, while another uses hip measurements or dress sizes. The cut also makes a difference: a low-rise style fits differently from a high-waisted one.

Before buying, measure your waist or hips and compare the result with the product’s size guide. For men’s boxers, the waist measurement is particularly important; for women’s briefs, it is often the hip measurement.

2. Confusing marketing claims with guarantees

Terms such as “antibacterial underwear”, “hypoallergenic” and “moisture-regulating” may sound clear, but their practical meaning varies from one product to another. Check whether the product description explains which material or treatment is responsible for this feature.

For example, Utree refers to a 10A antibacterial gusset lining. This is a claim from the brand’s product description and should not be interpreted as a medical effect or guarantee. Always wash the underwear according to the care label too; treatments and fibres can change through washing.

3. Buying a multipack without checking the fit

An underwear multipack is convenient for everyday laundry and may offer a lower price per item. However, if the fit is wrong, you immediately end up with three or five items you may not wear. So check the leg openings, waistband, coverage and stretch first.

Thongs focus on minimal coverage and low visibility under clothing. Classic briefs or boxer briefs generally provide more coverage. None of these styles is suitable for every situation.

Important features to compare

Material: cotton, modal or a stretch blend

Cotton underwear feels familiar and is often chosen for everyday wear. Check the exact fibre composition. A product made from 95% cotton and 5% elastane combines a cotton base with stretch. This can help with freedom of movement and maintaining the shape.

Modal is a smooth cellulose fibre with a soft feel. According to the product description, Utree women’s styles combine beechwood modal with a cotton and silk gusset lining. With this type of underwear, always check which material is used for the main body and which is used in the gusset.

Elastane can be practical for sport or light exercise, but more stretch does not automatically mean more support. Also look at the construction of the waistband and leg openings.

Fit and seams

Pay attention to these points:

  • Waistband: should fit securely without digging into your skin.
  • Leg openings: smooth or finished edges can help reduce friction, but the effect varies depending on your body shape.
  • Gusset lining: check the length, width and material used.
  • Seams: a seamless underwear style or flat seams may be less visible under trousers or a dress.
  • Coverage: choose between a thong, brief, trunk, boxer brief and loose boxer based on your clothing and how you plan to use it.

According to the Utree product description, a longer gusset lining provides extra coverage. This is a verifiable design feature, but it says nothing about medical suitability.

Size, pack contents and care

Do not compare only the price of a pack. Also consider the number of items, material and care requirements. A 3-pack of disposable underwear can be practical for travelling, while a 5-pack of washable underwear makes more sense for regular use.

Check the following before ordering:

  1. Your body measurements in centimetres or the official size guide.
  2. The number of items and colour distribution.
  3. The washing instructions, such as washing at 30 °C and not tumble drying.
  4. Whether the style is intended for single use.
  5. The returns policy for hygiene products.

For disposable underwear, use it once and follow local waste-disposal instructions. The product descriptions of some styles state that cotton is biodegradable, but the rate of decomposition depends on the material, processing and waste environment. Do not therefore treat this as a reason to dispose of the product carelessly.

Our recommendations for different uses

Suitable for: Budget-conscious beginners
Urban Classics Boxer Shorts 3-Pack Underwear

Urban Classics Boxer Shorts 3-Pack Underwear

Why it suits this profile: A straightforward 3-pack for anyone looking for a washable everyday basic without immediately buying a large stock.

How this product avoids the pitfall

The composition is clearly stated: 95% cotton and 5% elastane. This means you can compare the fabric rather than relying only on general comfort claims.

Key benefit & advantages

Stretch jersey, machine washable and three items per pack. Check the available sizing in the size guide before ordering.

Suitable for: Shoppers seeking premium quality
Calvin Klein 3-Pack Slim Boxers Icon Cotton Stretch

Calvin Klein 3-Pack Slim Boxers - Icon Cotton Stretch

Why it suits this profile: Ideal for anyone looking for a branded style with a close-fitting cut, detailed product information and a 3-pack.

How this product avoids the pitfall

The pack contents, care instructions and fit are specified. However, check that a slim-fit style suits your preferences and allows enough freedom of movement.

Key benefit & advantages

Cotton with elastane, three classic colours and machine-washing instructions at 30 °C according to the product information.

Suitable for: Specific uses & intensive users
YIJINCHAN Women's Disposable Pure Cotton Underwear

YIJINCHAN Women's Disposable Pure Cotton Underwear 3-Pack-L

Why it suits this profile: Handy for travelling, gym bags or situations where washing is not practical.

How this product avoids the pitfall

Each item is individually packaged and clearly intended for single use. This prevents you from confusing a travel solution with washable everyday underwear.

Key benefit & advantages

3 items, 100% cotton according to the product description and size L for hips measuring 99–109 cm. Not intended as a cost-effective option for daily reuse.

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.

Care and lifespan

Washable underwear generally remains usable for longer when you follow the care label. Wash dark and light colours separately if colour transfer could be a problem. Avoid bleach on elastic fabrics and only use a tumble dryer when the label permits it. High temperatures can damage elastane and elastic waistbands more quickly.

Replace underwear when the fabric becomes thin, the waistband no longer fits securely, seams come undone or the fit changes permanently. With disposable underwear, washing is not part of its intended use; throwing it away after one wear is part of the product design.

Frequently asked questions about underwear

Which material is suitable for everyday underwear?

Cotton is often chosen for its soft, familiar texture. A cotton-elastane blend provides extra stretch. According to the product description, modal feels smoother. Always check the full composition and choose based on fit, care requirements and personal preference.

How do I choose the right underwear size?

Measure your waist or hips with a flexible tape measure, without pulling it tight. Compare the result with the size guide for the specific style. Do not automatically choose the same size as you wear in trousers, as brands and cuts can vary.

Is an underwear multipack better value?

That depends on the price per item, the material and how often you use the product. A 5-pack of washable men’s boxers can be practical for everyday wear. A 3-pack of disposable underwear is mainly useful for travelling or temporary use, but is thrown away after one wear. Therefore, calculate the cost per wear rather than looking only at the pack price.