How to Care for Your Bikini Briefs So They Last More Than One Summer

Quick Answer

Rinse your bikini briefs in cool fresh water as soon as you take them off, hand wash them in cool water with a gentle detergent, then dry them flat in the shade. Skip the washing machine, the hot tap and the hot dryer — those three habits are what break down swimwear elastic and fade colour fastest.

A bikini brief rarely dies from wearing. It dies from chlorine, sunscreen, hot water and a tumble dryer. The fabric and elastic that make a brief fit well are the same things that degrade fastest when they're treated like ordinary laundry.

The good news is that bikini brief care takes about five minutes and almost no equipment. Below is the exact order to follow, from the moment you take your briefs off to how you store them at the end of the season — plus the mistakes that quietly shorten a swimwear lifespan.

Why swimwear needs a different routine

Swimwear fabric is built to stretch and recover, and that recovery comes from elastane blended into the fibre. Chlorine, salt, heat and sunscreen residue all attack elastane over time, which is why a brief can look fine but feel loose after a season of neglect. Rinsing and cool washing slow that process down.

Construction matters too. A high-waisted style with an extended leg line, like the Lexi Bikini Brief, relies on its shape holding through the waist and leg openings. Once elastic goes, the fit goes with it — no amount of careful washing brings it back. Treat the care routine as protection, not repair.

• Cool water and gentle detergent are the two non-negotiables.
• Heat is the single biggest cause of stretched-out swimwear.

What you actually need

You don't need a specialty swimwear kit. A basin or clean sink, cool running water, a mild liquid detergent (a gentle hand-wash or delicates formula works well), a clean towel and a shaded drying spot cover almost everything.

Avoid anything labelled bleach, fabric softener or enzyme-heavy stain remover. Softener coats the fibres and reduces stretch recovery, while bleach weakens them outright. If you only remember one rule, remember this one.

• A soft microfibre cloth helps lift sunscreen residue without scrubbing.
• Keep a dedicated small mesh bag for travel so briefs don't snag on other items.

How to handle briefs with mesh or lace details

Not every brief is built the same way, so check the construction before you wash. The Juni Brief uses sheer mesh side panels with buttery microfibre, and mesh is more prone to snagging than a solid knit — so keep it away from zips, hooks and velcro in the wash.

Lace is the other one to watch. The Evie Brief features custom lace detailing and a cotton gusset for breathability, and lace holds up best when it's never wrung, twisted or machine-spun. Squeeze gently instead, and let the fabric do the rest.

• Wash mesh and lace items separately from towels and denim.
• Never wring lace — press it between a towel instead.

Drying and storing without wrecking the fit

Lay briefs flat in the shade, reshaping the waist and leg openings as they dry. Direct sun fades colour and heat weakens elastic, so a shaded balcony or indoor rack is better than a hot line in full afternoon sun. If you must hang them, hang by the waistband rather than the leg openings.

For storage, fold rather than hang long-term, and keep briefs away from damp. A dry drawer or a breathable bag is fine. If you're packing for a trip, put briefs in last so nothing heavy presses on them.

• Drying flat preserves the shape of high-waisted and high-cut styles.
• Never store swimwear damp — even overnight, it can leave a smell that's hard to shift.

A note on lingerie briefs versus swim briefs

If you're caring for everyday lingerie briefs rather than swimwear, the routine is gentler but the rules are similar: cool wash, no softener, air dry. One practical difference is returns — MARVELL LANE does not accept returns or exchanges on lingerie briefs for hygiene reasons, so getting the size right first matters more.

That's worth knowing before you buy. The Busty Basics Brief is a comfy everyday option, and because it can't be returned once purchased, check the size guidance carefully rather than assuming you'll exchange it later.

• Lingerie briefs: cool hand wash, no softener, air dry flat.
• Check sizing before ordering — lingerie briefs are non-returnable for hygiene reasons.

Your Step-by-Step Bikini Brief Care Routine

1. Step 1: Rinse immediately after wearing: Take your briefs off and rinse them in cool fresh water before they dry out. This lifts chlorine, salt and sunscreen residue before it settles into the fibres. A 30-second rinse is enough. Common mistake: leaving them in a damp towel overnight. That's where smells and dull colour start.
2. Step 2: Hand wash in cool water with a gentle detergent: Fill a basin with cool water, add a small amount of mild liquid detergent, and gently squeeze the brief through the water. Focus on the gusset and waistband. Don't scrub, and don't use bleach or fabric softener. Checkpoint: the water should never be hot enough to feel warm on your hands.
3. Step 3: Rinse until the water runs clear: Empty the basin and rinse under cool running water until no suds remain. Detergent left in the fabric attracts residue and can irritate skin, especially on a brief with a cotton gusset like the Evie Brief. Common mistake: stopping when the surface looks clean. Squeeze the waistband and check for hidden suds.
4. Step 4: Remove water without wringing: Lay the brief flat on a clean, dry towel, roll the towel up and press gently to absorb excess water. Never twist or wring, particularly on mesh or lace styles such as the Juni Brief. Checkpoint: the brief should feel damp, not dripping.
5. Step 5: Dry flat in the shade: Reshape the waist and leg openings, then lay the brief flat on a rack away from direct sun and heat. Avoid radiators, hot cars and tumble dryers entirely. Common mistake: hanging by the leg openings, which stretches them out of shape.
6. Step 6: Store dry and folded: Once completely dry, fold briefs and store them in a dry drawer or breathable bag. Keep swimwear separate from heavy items that could snag textured or mesh fabric. Next step: at the end of the season, do one final cool wash before storing so no residue sits for months.

Product Details Worth Knowing Before You Wash

• Lexi Bikini Brief: A 90s-inspired high-waisted design with an extended leg line, medium coverage and a fit that sculpts the hips while resting just below the belly button. High-waisted shapes depend on waistband elastic holding its tension, so cool washing and flat drying protect the fit you bought it for.
• Murphy Bikini Brief - Black: An ultra-high rise style with medium coverage, high-cut legs, clean seams and a textured fabric that is stretchy without feeling compressive. Textured stretch fabrics snag easily, so keep this brief away from zips and hooks and skip the machine.
• Juni Brief: A vintage-inspired high-rise brief with moderate coverage, sheer mesh side panels and buttery microfibre construction. Sheer mesh panels are the most delicate part of the brief, so hand washing and towel-pressing protect them best.
• Evie Brief - Black: A mid-rise brief with moderate coverage, custom lace detailing and a cotton gusset for breathability. Lace should never be wrung or machine-spun; gentle squeezing and shade drying keep the detail intact.

Bikini brief care comes down to three habits: rinse straight away, wash cool by hand, and dry flat in the shade. Do that and the elastic, colour and fit hold up far longer — which means the brief you loved this summer is still the one you reach for next year.