This one habit after swimming will make your swimsuit last all summer long
Every summer, the same scenario plays out: you get back from the beach, toss your swimsuit to the bottom of your bag, and forget about it until the next day. Yet this seemingly harmless habit is one of the main causes of premature fabric wear, lingering odours, and skin irritation.
What chlorine, salt, and sunscreen really do to the fibres
A swimsuit worn in a pool or the sea picks up far more than just water. Chlorine weakens synthetic fibres, distorts their shape, and strips them of their elasticity. Sea salt has a similar effect, especially when it dries directly on the fabric without being rinsed off first. UV rays, meanwhile, attack the dyes and gradually dull the colours.
Sand acts as an abrasive, working its way into the weave. And sunscreen leaves greasy residue that builds up in the fibres over time. Combined with sweat, these deposits clog the fabric, stiffen it, and cause colours to fade. A swimsuit can look perfectly clean on the surface while harbouring bacteria responsible for persistent odours, especially if it has been left damp and folded for several hours.
Rinse or full wash: what daily care actually recommends
The good news is that you don’t need to run a machine every evening. A thorough rinse in cold water as soon as you get out of the water is enough to remove most of the salt, sand, and chlorine embedded in the fibres. The sooner you do it, the less time those residues have to break down the fabric.
That said, after a full day at the beach or pool, a gentle hand wash is preferable, especially if the swimsuit has sunscreen on it or has been worn for several hours straight. A small amount of mild detergent in a basin of cold water, a few minutes of soaking, and a light rub are all it takes to lift residue without damaging the material.
The rule to remember is simple: rinse after every swim, hand wash regularly, and whenever the swimsuit is particularly dirty.
When daily washing is truly necessary
In certain situations, washing your swimsuit every day is not excessive. Here are the cases where that frequency is fully justified:
- After every use in a pool or spa, due to the chemicals present in the water
- For sensitive or irritation-prone skin, whether in children or adults
- In intense heat or when you sweat heavily under the swimsuit
- When the swimsuit is worn for several hours at a stretch, whether swimming or not
Medical guidance also advises against keeping a wet swimsuit against the skin for extended periods, particularly around sensitive intimate areas. This further underlines the importance of removing a damp swimsuit promptly after swimming.
Machine or hand wash, drying and storage: the right habits to adopt
If you opt for the machine, choose a delicate cycle at a maximum of 30°C and place the swimsuit in a mesh laundry bag to minimise friction and protect the elastic. Fabric softener is a no-go: it damages synthetic fibres. Hand washing remains the gentlest method for frequent care.
Once washed, do not wring the swimsuit out. Press it gently between your hands or in a towel without forcing it. Then let it air-dry, ideally in the shade. A tumble dryer will shrink and distort stretch fabrics, so it is best avoided. Equally, leaving a wet swimsuit scrunched up in a bag encourages bad odours and speeds up wear.
None of these habits takes more than five minutes. Yet a well-cared-for swimsuit can last two or three extra seasons before you need to replace it. Washing it aggressively more often is not the answer: it is the regularity and gentleness of the routine that makes the difference, not the intensity.
