Joybuy Insights

Choosing branded underwear without making a mistake: focus on fit, fabric and use

Buying branded underwear might seem straightforward, but an attractive logo or a bargain multi-pack doesn't tell you everything. A poor fit can pinch, a fabric that's too slippery can shift, and an unclear size guide can make returns more complicated. So whether you're looking for men's underwear, women's underwear or sports underwear, it's worth comparing the practical features first.

Three common pitfalls when buying branded underwear

1. Only looking at the brand or the price

A well-known brand doesn't automatically guarantee the right fit. Calvin Klein underwear, FILA thong, GANT trunks and sports models from Under Armour each have a different cut and choice of materials. So always compare the composition, waist height, leg length and sizing rather than just the logo or the offer.

2. Buying a multi-pack without deciding how you'll use it

A 3-pack of thongs can be handy for wearing under fitted clothing, while men's boxers or men's trunks offer more coverage for everyday wear. A multi-pack is only good value if the style and colours suit your wardrobe. Three pairs you rarely wear won't give you much practical benefit.

3. Skipping the size guide

Sizes vary between brands and sometimes even between models. A size L from one brand can fit differently to a size L from another. For plus size underwear, check the waist or hip measurement in particular, and see whether the style is described as fitted, slim, relaxed or compression fit.

Which specifications matter?

Fabric: cotton, elastane or synthetic fibres

Cotton underwear generally feels soft and is often chosen for everyday wear. Elastane provides stretch and helps the garment fit better. Look at the exact ratio:

  • A Calvin Klein Hip Brief 3-Pack is described on the product page as cotton; one variant states 95% cotton and 5% elastane.
  • The Calvin Klein thongs are made from 90% cotton and 10% elastane, according to the product specification.
  • The Under Armour model consists of 84% polyester and 16% elastane, with mesh panels of polyester and elastane, according to the product information.

A higher percentage of elastane doesn't automatically mean more comfort. The style also needs to fit well without being too tight. For warmer days, a breathable cotton blend can be pleasant; for intense activity, a synthetic, quick-drying fabric is often offered.

Fit and style

The main styles each have their own purpose:

  • Hip briefs: a short style with relatively little fabric and a close fit.
  • Men's trunks: short legs and more coverage than a brief.
  • Men's boxers: usually longer legs and suitable under looser-fitting trousers.
  • Thongs: minimal coverage and less visible lines under fitted clothing.
  • Sports underwear: often made from stretchy synthetic fabrics and designed to move with you.

Pay attention to details such as a wide waistband, flat seams and the position of the leg openings. A logo elastic can look smart, but check that the band isn't too stiff. With a compression fit, such as some Under Armour models, going up a size might make sense if you prefer less pressure.

Colour and care

White underwear is versatile, but can discolour more quickly if washed incorrectly. Wash white and coloured items according to the care label and don't use bleach if it's not recommended. The care instructions vary for the products discussed: some models can be tumble dried on a low setting, while others are not suitable for tumble drying.

Always check:

  1. The recommended washing temperature.
  2. Whether tumble drying is allowed.
  3. Whether ironing is possible.
  4. Whether the garment should be washed with similar colours.

Careful handling helps preserve the fit and elasticity for longer, but the actual lifespan also depends on how often you wear it, your washing routine and the fabric.

Recommended choices by user type

Suitable for: Budget-conscious beginners
Calvin Klein Hip Brief 3PK 100 3 White Men L

Calvin Klein Hip Brief 3PK 100 3 White Men L

Why this suits the profile: A multi-pack of three white hip briefs is practical if you're looking for a simple everyday staple. The classic cut is straightforward for anyone buying branded underwear for the first time.

How this product avoids the pitfall

The product page lists the fit, size and care instructions, so you don't have to rely on the brand name alone.

Key benefit & highlights

Set of three; white; cotton blend; elasticated waistband; machine washable according to the product information.

Suitable for: Shoppers looking for top quality
GANT Men Underwear Trunk 3P Gant Grey Navy White S

GANT Men Underwear Trunk 3P Gant Grey Navy White S

Why this suits the profile: This set combines three neutral colours with a trunk style. That suits someone who wants to combine appearance, everyday practicality and a sturdy construction.

How this product avoids the pitfall

The choice isn't just about branding: the description mentions 95% cotton, 5% elastane, a trunk fit and reinforced seams.

Key benefit & highlights

Three colours; cotton-elastane blend; machine washable; logo waistband; short legs for support and freedom of movement.

Suitable for: Specific use & intensive users
Under Armour Men's Hg Armour Shorts White Sportstyle Collection L

Under Armour Men's Hg Armour Shorts White Sportstyle Collection L

Why this suits the profile: This style is designed for training, as a base layer and for active days. The stated compression fit suits users who want a close-fitting sports style.

How this product avoids the pitfall

The product information states the exact fibre composition, size guide and a note that you can consider going up a size if you prefer a less tight fit.

Key benefit & highlights

84% polyester and 16% elastane; mesh panels; ergonomic seams; wide waistband; side pocket; machine washable according to the label.

Suitable for: Shoppers looking for invisible lines
FILA Thong 3-pack White Size M

FILA Thong 3-pack White Size M

Why this suits the profile: A FILA thong 3-pack is designed for those who want minimal coverage and a discreet style under fitted clothing.

How this product avoids the pitfall

Choosing a thong is linked to its intended use. This helps you avoid buying a style with too little or too much coverage.

Key benefit & highlights

Three white thongs; cotton-elastane fabric; machine washable; available in multiple sizes, including XS, S, M, L and XL.

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 branded underwear

How often should I replace branded underwear?

That depends on how often you wear it, the fabric and how you wash it. Replace an item when the elastic band loses its tension, seams come loose, the fabric becomes thin or the fit is no longer right. A multi-pack can help you rotate items and wash them less frequently.

Is cotton suitable for everyday wear?

Cotton is often chosen for its soft feel and breathable properties. But do check whether the product is a cotton blend and how much elastane has been added. For sport or intense activity, a synthetic fabric with stretch can be more practical. Always follow the care label to minimise shrinkage and loss of elasticity.

How do I choose the right size for plus size underwear?

Measure your waist or hips at the point indicated in the size guide. Compare your measurement with the product page and pay attention to the fit. With a tight sports style, the sizing can feel different to a relaxed trunk style. Don't automatically choose a larger size: a garment that's too loose can shift, while one that's too small can feel uncomfortable.