Joybuy Insights

Choosing underwear without buyer’s remorse: check the fit, material and intended use

Underwear is often sold in multipacks, so making the wrong choice can quickly leave you with several unusable items. For example, comfortable boxer shorts may feel too tight around the legs, while attractive women’s underwear may show through clothing or lose its shape after just a few washes.

The main pitfalls are:

  • Choosing based only on the brand or appearance: Calvin Klein underwear and Reebok boxer shorts may look appealing, but the material, cut and size ultimately determine how comfortable they are to wear.
  • Buying a multipack without checking the fit: A 3-pack or 5-pack of men’s boxer shorts is practical, but less cost-effective if the waistband digs in or the legs ride up.
  • Confusing “shaping” with unlimited comfort: Women’s shaping briefs and shapewear offer a close-fitting cut. According to the brand’s product description, a particular model is designed for light shaping; that does not mean it is suitable for wearing tightly all day.
  • Ignoring care instructions: Elastic fibres, printed waistbands and bonded seams can wear out more quickly due to high temperatures, bleach or tumble drying.

Three specifications to check before buying

1. Material and stretch

For everyday wear, cotton and elastane are a practical combination. Cotton generally feels soft, while elastane allows the garment to move with you. For example, an Urban Classics boxer contains 95% cotton and 5% elastane. According to the product information, the organic cotton version has the same composition and is available as a 5-pack.

Men’s sports underwear more often focuses on synthetic fibres. According to the product specification, an Under Armour model consists of 84% polyester and 16% elastane, with mesh panels made from 92% polyester and 8% elastane. This is a different material choice from cotton underwear and is particularly suited to movement and a close-fitting cut.

Also watch out for vague descriptions such as “soft fabric” or “breathable”. Check that the fibres are actually listed and that the proportions are clearly stated.

2. Fit, waist and leg length

With men’s boxer shorts, these points are particularly important:

  • Rise: low-rise styles sit lower on the hips, while a regular rise provides more coverage.
  • Leg length: longer legs can reduce chafing between the thighs, but may feel less comfortable under tight trousers.
  • Waistband: an elasticated band should stay securely in place without digging into your skin.
  • Pouch and seams: a supportive front and flat seams can affect the fit.

With women’s underwear, consider the leg opening, rise and how visible it will be under clothing. Seamless shaping shorts, for example, are designed to create a smooth transition under a dress or skirt. Always check the size guide, though: “seamless” does not automatically mean that the garment will be comfortable in every size.

3. Sizing and care

Use the size guide for the specific product, rather than relying only on your usual size. International sizes can vary between brands and models. Some products list waist measurements in centimetres, while others only show EU or international sizes.

Care instructions are part of choosing the right product:

  • Follow the washing temperature shown on the label.
  • Do not use bleach if it is not recommended.
  • Avoid tumble drying when elastane or bonded joins may be vulnerable.
  • Ideally, wash dark colours with similar colours.
  • Hand-wash shaping products according to the product information.

According to the product description, a Feelingirl model designed for light shaping consists of two nylon-elastane layers. The design includes bonded seams, side stays and non-slip material around the leg openings. The manufacturer recommends gentle hand washing only, with no tumble drying or dry cleaning.

Product choices by user 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 Underwear

Why it suits this profile: A practical 5-pack for anyone looking to buy several pairs of everyday boxer shorts and who prefers a cotton stretch fabric.

How this product avoids the pitfall

The composition is clearly stated: 95% organic cotton and 5% elastane. The international size guide helps you check the fit.

Key benefit & advantages

5 pairs per pack, 95% organic cotton and machine washable according to the product information.

Suitable for: Shoppers looking for premium quality
Calvin Klein 3 Pack Low Rise Trunks Icon Cotton Stretch

Calvin Klein 3 Pack Low Rise Trunks - Icon Cotton Stretch

Why it suits this profile: For anyone looking for a recognisable brand and low-rise trunk style for everyday wear.

How this product avoids the pitfall

The product information states 95% cotton, 5% elastane, a 3-pack and a size guide with waist measurements in centimetres.

Key benefit & advantages

Cotton stretch, contoured pouch and machine washable according to the product specifications.

Suitable for: Specific uses & intensive users
Under Armour Men's Hg Armour Shorts Black Sportstyle Collection

Under Armour Men's Hg Armour Shorts Black Sportstyle Collection

Why it suits this profile: A good choice for training, cycling or active working days when you want close-fitting sports shorts.

How this product avoids the pitfall

The fit is described as a compression fit. If you prefer a looser fit or are between sizes, consider choosing one size larger.

Key benefit & advantages

Polyester elastane, strategically placed mesh panels and a 15 cm inseam according to the product information.

Suitable for: Women looking for light shaping
Feelingirl Mesh Smooth Mid-Thigh Shaping Shorts

Feelingirl Mesh Smooth Mid-Thigh Shaping Shorts

Why it suits this profile: Designed for anyone who wants to wear seamless shaping shorts with a low-back dress or close-fitting outfit.

How this product avoids the pitfall

The product description states that the shaping is light. Check the XS to 3XL sizing and follow the hand-washing instructions to protect the bonded joins.

Key benefit & advantages

62% nylon and 38% spandex in the outer layer, a low back and non-slip material around the leg openings.

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.

Other practical underwear choices

For men who want to compare several styles, Reebok boxer shorts are available in 3-packs and 5-packs. The product information mentions features including an elasticated waistband and a soft, flexible construction. Check the exact fabric composition for each model, though; it can vary between, for example, a cotton trunk and a polyester blend.

For women, Calvin Klein boyshorts are available in a cotton-modal-elastane blend. According to the product description, one version consists of 53% cotton, 35% modal and 12% elastane. This model has a low rise, mid-length legs and a wide elasticated waistband.

Tummy-control underwear or a shaping style is primarily a clothing choice for creating a close-fitting silhouette. It does not change your body and is not the same as medical support. Wear it only for as long as the fit remains comfortable, and stop if you experience irritation or discomfort.

Frequently asked questions about underwear

How often should you replace your underwear?

This depends on how often it is worn and washed, as well as the material. Replace an item when the elasticated waistband loses its stretch, the fabric becomes thin, the seams start to come undone or the fit changes permanently. There is no fixed replacement period for every garment.

Is cotton always suitable for sport?

Not necessarily. Cotton can feel comfortable for everyday wear, but it retains moisture for longer than many synthetic sports fabrics. For intense training, you may want to consider a sports model made with polyester, elastane and ventilation panels. Look at the composition and care label rather than relying solely on the marketing copy.

How do you choose the right size for shaping underwear?

Measure your waist and hips, then compare these measurements with the product’s size guide. Do not automatically choose a smaller size for more shaping. If the fit is too tight, the leg openings may roll up and comfort may suffer. Also check the rise, leg length and returns policy before ordering.