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Underwear brand: how to choose the brand that suits you
Underwear brand: how to choose the brand that suits you
Does cotton shrink?
Yes, cotton can shrink, especially during the first wash and when exposed to high heat. The amount of shrinkage depends on the fabric composition, the finish, and the care label. Using a cool or mild wash, a gentle cycle, and drying carefully usually helps prevent unnecessary shrinkage.
Why cotton shrinks after washing
Cotton can shrink because natural fibres react to moisture, heat, and movement. Read more about how different fibres behave in textile fibres explained. During washing, the fibres can contract, especially at high temperatures or during long, intensive cycles. The most noticeable change often occurs during the first wash; after that, the size usually remains more stable. However, not every garment reacts the same way: knits, crochet, woven cotton, and pre-treated fabrics each behave differently. Ribbed cotton can also react differently; therefore, choose the right ribbed fabric for your underwear.
Which temperature and wash setting are safest?
As a general rule: the hotter and longer the cycle, the greater the risk of shrinkage.
| Temperature or cycle | Risk of shrinkage | Safest approach |
|---|---|---|
| 30 °C, delicate/short/wool | Low | Often the safest choice for cotton that needs to retain its shape |
| 40 °C, normal cycle | Moderate | Can be fine if the label allows it, but carries more risk than 30 °C |
| 60 °C | High | Only use if the care label explicitly states so |
The care instructions and symbols on the label always take precedence. Be extra careful during the first wash and, if in doubt, choose the lowest permitted setting.
Washing cotton without unnecessary shrinkage: how to do it safely
- First check the care label and sort by colour and fabric type; also read which fabric is right for your underwear.
- Use a mild detergent and do not overfill the drum.
- Hand wash delicate or shape-sensitive items; machine washing on a gentle cycle is perfectly fine.
- It is best to use a low spin speed and remove clothes from the machine quickly.
- Gently reshape the garment and preferably let it air dry, especially for frequently washed basics such as underwear, pyjamas, and socks.
Why the dryer often causes more shrinkage than washing
The dryer often causes more shrinkage than washing itself. This is due to the dry heat, which causes cotton fibres to contract further. If fit is important, air drying is usually the safest choice, even when washing underwear. Also avoid direct heat sources such as a radiator, as this can make cotton feel less pleasant and stiffer. A low drying setting is only suitable if the label allows it. Not sure about sleepwear? Check comparing pyjama materials.
Does cotton always shrink? The composition makes the difference
No, cotton does not always shrink by the same amount. A garment made of 100% cotton often reacts differently than cotton with elastane, which has more stretch, or cotton-linen, which dries differently. Quality, finish, and intended use also determine how well the fabric retains its shape. Jeans are a clear example: denim often contains a lot of cotton and can therefore shrink, especially when washed and dried at high temperatures, just like cotton socks. Always look at the fibre percentages and care symbols, not just the product name.
