A swimsuit does most of its travelling folded, in the dark, under the weight of everything else you own. The fabric gets a week of sun and salt, which is what it was built for, and four or five hours compressed flat inside a case, which it was not. A suit that leaves home in good condition and arrives creased, dented and faintly musty has not worn out. It has been packed badly.
Almost all of it comes down to three decisions: how you fold, where in the case the suit sits, and what you do with one still damp when the taxi arrives. Get those right and swimwear travels better than anything else in the bag: it weighs nothing, needs no ironing, and is ready an hour after you unpack.
Creases in swim fabric behave differently
Cotton creases because the fibres bend and stay bent until water and heat relax them again: a nuisance, not damage. Elastane creases because it is held in one position under pressure, and the longer and warmer that pressure, the more of the fold the fibre keeps. A sharp crease pressed into a compression panel and then left in a hot car boot for two hours can still be visible days later, by the same mechanism behind the one care instruction every brand agrees on: never wring. The fix is not to avoid folding, which a suitcase makes impossible, but to avoid sharp folds under load: soft folds, few of them, nothing heavy on top.
Fold flat, not tight
Rolling is excellent advice for shirts and poor advice for swimwear: a tight roll forces a small-radius bend through every layer at once and compresses the knit while it does it. Lay the suit out flat instead, as you would to dry it, bring the sides in once and fold it over once more — two gentle folds, lining lying against the shell rather than twisted through it. Straps are what usually gets ruined in transit — loose ones wind around a zip or end up under a shoe — so tuck them inside the body of the suit. Then pack it at the top of the case, not the bottom: weight travels downwards, and a leg opening is exactly where you do not want it to land.
Moulded cups need something inside them
Anything shaped — a moulded cup, a foam insert, a structured bandeau front — holds its form because it was set into that shape, and a dent pressed into it at the airport tends to stay a dent. Nest them rather than flattening them: fold the suit so one cup sits inside the other, then fill the hollow with something soft and clean, a pair of socks or rolled underwear. The aim is to support the curve from the inside so a packed case cannot collapse it. A packing cube is useful for keeping suits together and away from sunscreen, and harmful the moment you pull the compression zip.
A suit does not arrive creased because it was cheap. It arrives creased because something heavy sat on a sharp fold in a warm place for four hours.
Never seal a damp suit and forget it
The hardest packing problem is the last swim before checkout. A damp suit zipped into a plastic bag is the worst case on every count: chlorine carries on reacting in wet fabric, salt crystallises inside the knit as it dries, dye lifts and transfers onto whatever it is pressed against, and warm still air is where the smell comes from. If you have twenty minutes, rinse in cool water, press the water out in a towel and leave it in the shade. If you have none, rinse it anyway, roll it loosely in a dry hotel towel and deal with it the moment you land. A mesh or breathable pouch is far better than a sealed one, and if a plastic bag is all there is, leave it open.
Unpack the swimwear first
- 01Take the suits out before anything else and lay them flat, or drape them over a rail. Real recovery relaxes a travel fold within an hour or two.
- 02Rinse and hand-wash anything that travelled damp, even if it was only damp for the flight.
- 03Pack suits at the top of the case, folded flat, straps tucked in, nothing heavy above them.
- 04Keep swimwear away from sunscreen, oils and anything that can leak — SPF stains are stubborn.
- 05Take two suits for a week rather than one: rotating them means neither goes back on wet, and a dry suit is a suit holding its shape.
- 06Never pack a suit loose with shoes, and never leave the case in a hot car longer than you have to.
Fabric decides how much of this you can get away with. A knit with genuine recovery comes out of a fold and forgets it ever happened; a tired one keeps the line. Ours is a double-lined sculpting Italian jersey woven at a family mill on Lake Como, chlorine and UV resistant, with shells spun from regenerated ocean nylon and bonded seams that lie flat rather than ridging under a fold. The travel rules are only the care rules in a smaller space: rinse in cool water, never wring, dry flat in the shade — and pack it like the most delicate thing in the bag, because it is.