Rinse immediately after every wear, hand-wash in cold water with a mild liquid detergent, press out the water with a towel, and lay flat to dry in the shade. That four-step routine handles the vast majority of swimwear care. The single biggest threat to any suit is the combination of heat, chlorine, and wringing, which together break down elastane faster than almost anything else.
- Rinse in cool water right after swimming to flush out chlorine, salt, sunscreen, and sweat.
- Hand-wash gently in cold water with a mild or swimwear-specific liquid detergent regularly.
- Press water out with a towel, never wring, and lay flat to dry away from direct sun.
Pro Tip: Always check the manufacturer’s care label before washing. Even within the same fabric family, construction details like molded cups, metal hardware, or bonded seams can change what’s safe.
Key Takeaways
Rinsing immediately after every wear and hand-washing in cold water with a mild detergent are the two habits that do the most to preserve a swimsuit’s fit, color, and elasticity over time.
| Point | Details |
|---|---|
| Rinse after every wear | Flush out chlorine, salt, and sunscreen in cool water right after swimming. |
| Full wash every 3–5 wears | Hand-wash in cold water with a mild or swimwear-specific liquid detergent. |
| Press, never wring | Roll in a towel to remove excess water; wringing breaks down elastic fibers. |
| Dry flat in the shade | Lay suits flat away from direct sun and heat; never use a tumble dryer or iron. |
| Room24 swimwear | Built with resilient, sustainable fabrics that hold shape through cold-water hand-washing. |
Table of Contents
- When should you rinse and how often do you fully wash?
- How do you hand-wash a swimsuit properly?
- Can you machine-wash swimwear?
- How do you remove sunscreen stains and chlorine odor?
- How should you dry and store swimwear?
- Does fabric type change how you wash a swimsuit?
- What can you do when a full wash isn’t possible?
- Why do these steps actually protect your swimwear?
- A perspective on caring for what you wear
- Room24 swimwear is designed to last longer with less effort
- Sources
When should you rinse and how often do you fully wash?
Rinsing immediately after every swim is non-negotiable. Chlorine, salt, sunscreen, and sweat all start degrading elastane and nylon fibers within minutes of contact, so a quick cool-water rinse right after you get out of the pool or ocean does real protective work. According to textile scientist research, pool pH and disinfectants accelerate fiber breakdown, and reducing exposure time is one of the most effective things you can do.
A full wash is a different matter. You don’t need to deep-clean after every single use, but Wirecutter recommends washing promptly with a mild detergent and avoiding leaving a wetsuit balled up in a bag, which creates the conditions for mildew and odor. Also, dermatology research from the Journal of the American Academy of Dermatology suggests washing new swimwear before the first wear to remove manufacturing residues that can irritate skin.
| Scenario | Recommended action |
|---|---|
| After every pool or ocean swim | Rinse in cool water immediately |
| After 3–5 wears, or heavy sunscreen/chlorine exposure | Full hand-wash with mild detergent |
| Visible staining, strong odor, or mildew | Deep clean with baking soda soak or oxygen-based treatment |
| Brand new suit, first wear | Full hand-wash before wearing |
How do you hand-wash a swimsuit properly?
Hand-washing is the gold standard for swimwear care. It removes oils and chlorine without the mechanical stress that a washing machine applies to delicate elastane blends. Forbes Vetted recommends cold-water hand-washing and rotating suits to extend their useful life.
What you need: a clean sink or basin, cool water, a mild liquid detergent or a swimwear/activewear-specific formula, a soft towel, and a mesh laundry bag if you’re traveling.
- Turn the suit inside out to protect the outer surface and any printed or textured details.
- Pre-rinse under cool running water to flush out the bulk of chlorine, salt, or sunscreen.
- Fill the basin with cool water and add a small amount of mild liquid detergent (about a teaspoon is enough for one suit).
- Submerge the suit and gently swish it for 30–60 seconds. For odor or heavier buildup, let it soak for up to 10 minutes.
- Rinse thoroughly under cool running water until no detergent remains.
- Press the suit gently against the side of the basin or against a clean towel to push out excess water. Never wring.
Pro Tip: Skip 2-in-1 detergents and anything with fabric softener or conditioner. Fabric softener coats fibers and reduces quick-dry performance. The American Cleaning Institute specifically advises following label instructions and avoiding high-alkaline cleaners on delicate fabrics.
Can you machine-wash swimwear?
Sometimes, yes, but only when the care label explicitly says so. Machine washing is a last resort for swimwear, not a default. The drum’s agitation and spin cycle put mechanical stress on elastane that hand-washing avoids entirely.
When the label does permit machine washing, Martha Stewart’s laundry guidance is clear: place the suit inside a mesh laundry bag, select the delicate or hand-wash cycle, use cold water, and set the spin to the lowest available speed. Use an ultra-mild liquid detergent, never powder.
Heat is the real danger. Dryer heat causes nylon and polyester blended with elastane to lose elasticity and can cause fibers to become brittle. Skip the dryer entirely, even on a low setting.
The mesh bag matters more than most people realize. Without it, straps and hardware catch on the drum or other garments, and the repeated tugging stretches elastic permanently. One machine wash without a bag can do the same damage as a full season of careless wear.
How do you remove sunscreen stains and chlorine odor?
Sunscreen and chlorine smell are the two most common complaints, and both respond well to simple treatments if you act before they set.
For odor: Add a half-cup of baking soda to a basin of cold water and soak the suit for 15–30 minutes before rinsing. The Spruce confirms this approach brightens fabric and neutralizes odor without damaging fibers.
For fresh sunscreen: Soak in cool water for a few minutes, then use a soft-bristle brush or your fingers to gently work a small amount of mild liquid detergent into the stained area before rinsing.
Stronger options for set stains:
- A brief white vinegar rinse (one part vinegar to three parts water) can cut through mineral deposits and residual odor.
- Oxygen-based stain removers are generally safe for synthetic swimwear fabrics, but always spot-test on an inconspicuous area first.
Never use:
- Chlorine bleach (destroys elastane and fades color permanently)
- Fabric softener or conditioner (coats fibers, traps odor, reduces stretch recovery)
- Hot water (accelerates dye bleeding and fiber breakdown)
- Stiff brushes or abrasive scrubbing (pills fabric and damages surface texture)
Always do a spot test before applying any treatment beyond mild detergent, especially on printed, embellished, or brightly colored suits.
How should you dry and store swimwear?
After washing, lay the suit flat on a clean dry towel and roll the towel up gently to absorb excess moisture. Then unroll and lay the suit flat on a fresh dry surface or a drying rack in a shaded spot. The Guardian is direct on this: UV rays continue breaking down elastane and fading colors even after the suit is out of the water, so shade drying is not optional.
Hanging a wet suit is a mistake many people make. The weight of water-soaked fabric, combined with gravity pulling on the straps, deforms the elastic bonds over time. Flat drying preserves both shape and support. Never iron swimwear, and never put it in the dryer.
For storage, fold suits gently or lay them flat in a drawer. Breathable fabric bags work better than sealed plastic, which traps moisture and encourages mildew. Rotating between two or three suits gives each one time to fully recover its shape between wears.
Pro Tip: If you’re storing suits for the off-season, make sure they’re completely dry before putting them away. Even slight dampness in a sealed drawer can cause mildew that’s nearly impossible to remove.
Does fabric type change how you wash a swimsuit?
Yes, and the differences matter. Most modern swimwear uses nylon or polyester blended with elastane (sold under brand names like Lycra or Spandex), but neoprene and lined suits need their own approach.
Nylon/spandex/Lycra: The most common blend and the most heat-sensitive. Cold water only, hand-wash preferred, lay flat to dry. Chlorine degrades nylon faster than polyester, so rinsing promptly after pool use is especially important for nylon suits.
Polyester: More chlorine-resistant than nylon and holds color well. Still benefits from cold-water hand-washing, but slightly more forgiving if machine-washed on delicate with a mesh bag.
Neoprene: Used in surf suits and some structured pieces. Rinse thoroughly after each use, soak gently in cool water if needed, and never wring. Neoprene can crack if dried in direct sun or heat. Check bonded seams before washing; aggressive agitation can separate them. The Arm & Hammer swimwear care guide covers neoprene-specific handling in detail.
Lined suits and molded cups: The lining and foam can absorb detergent and take longer to rinse clean. Press gently through the cups rather than squeezing them flat, which can crack the foam.
Metal hardware: Rinse thoroughly to prevent rust or oxidation. Avoid soaking for extended periods and dry hardware-side up so water doesn’t pool around clasps or rings.
| Fabric | Best wash method | Heat sensitivity | Drying approach |
|---|---|---|---|
| Nylon/spandex blend | Hand-wash, cold water | High | Flat, in shade |
| Polyester/spandex blend | Hand-wash; machine on delicate if label allows | Moderate | Flat, in shade |
| Neoprene | Gentle rinse/soak, no agitation | High | Flat, away from sun and heat |
| Lined/molded cups | Hand-wash, gentle press on cups | High | Flat, cups face up |
What can you do when a full wash isn’t possible?
Travel and vacation situations don’t always allow for a proper wash. A quick cool-water rinse in a hotel sink or shower, followed by pressing the suit in a towel, removes most of the chlorine and salt that cause the most damage. It’s not a substitute for a full wash, but it buys time.
For odor between washes, a brief soak in a diluted white vinegar solution (one part vinegar to three parts cool water) followed by a plain water rinse and shade drying works well in a hotel bathroom. Baking soda dissolved in cool water is an equally effective option if you have it on hand.
- Rinse in cool water immediately, even if it’s just a 60-second rinse in the shower.
- Press out water with a towel; never leave the suit balled up wet in a bag.
- Air-dry in the shade, even if that means draping it over a chair near an open window.
- Pack a small bottle of mild liquid detergent for longer trips. A travel clothesline or lightweight drying towel makes the routine much easier. Room24’s resort wear packing guide has practical tips on what to bring for pool-to-sunset days.
Why do these steps actually protect your swimwear?
The science behind the routine is straightforward. Textile scientist Carolina Quintero Rodriguez notes that pool pH and disinfectants accelerate fiber breakdown, and reducing the time those chemicals stay in contact with fabric is one of the most effective protective steps you can take. Rinsing immediately isn’t just a habit; it’s chemistry.
Heat and mechanical stress work differently but cause similar damage. Elastane degrades when its polymer chains are repeatedly stretched under heat or agitation without recovery time. Wringing, tumble-drying, and hot water all apply that stress in concentrated bursts.
Standard laundry detergents are formulated for cotton and heavier fabrics. On elastane blends, they leave a residue that traps odor and reduces the fiber’s ability to snap back after stretching. A swimwear- or activewear-specific detergent is a small investment that pays off in how long a suit holds its shape.
A perspective on caring for what you wear
The care routine in this guide isn’t just about keeping a suit looking good for one more season. At Room24, the approach to swimwear starts with sustainable, durable fabrics precisely because a well-made piece deserves to last. Treating your swimwear with the same attention you’d give any quality garment — rinsing promptly, washing gently, drying carefully — is the most direct way to get full value from it and reduce the cycle of replacing pieces that wore out too fast.
Room24’s swimwear collection is built with construction details that hold up to this kind of care: fabrics chosen for resilience, cuts designed to keep their shape, and finishes that respond well to cold-water hand-washing. The routine described here works especially well with pieces built to last.
Room24 swimwear is designed to last longer with less effort
Room24’s swimwear is made from durable, sustainable fabrics that hold their shape and color through repeated cold-water hand-washes. The pieces are designed with the kind of construction — clean finishes, resilient elastane blends, minimal hardware — that makes the care routine in this guide straightforward rather than fussy. No special treatments, no complicated steps. Rinse, hand-wash cold, lay flat to dry, and the suit does the rest.
If you’re looking for swimwear that works with a simple care routine rather than against it, browse the Room24 swimwear collection and find pieces built to go the distance.
Sources
- How To Wash Swimsuits | Martha Stewart
- Do I have to rinse out my swimsuit after the pool? A textile scientist has the answer | The Conversation
- How To Care For Swimwear 2026 - Forbes Vetted
- How to Wash Swimsuits | Reviews by Wirecutter
- How to Wash Swimsuits the Right Way | The Spruce
