How to Care for Men's Swim Briefs So They Last Longer

By JOR Underwear - Premium Men's Underwear Boutique | Published: 2026-10-13

Category: Conseils et entretien

A practical, step-by-step routine for washing, drying, and storing men's swim briefs so the fabric keeps its stretch, color, and shape season after season.

Quick Answer

Rinse your swim briefs in cool water immediately after every swim, wash them by hand with a mild detergent, and dry them flat in the shade. That three-step habit removes chlorine and salt before they can break down stretch fibers, which is the single biggest reason swimwear loses its fit and color.

Why Rinsing Right After Swimming Matters Most

Chlorine, salt, and sunscreen residue keep working on fabric after you leave the water. The longer they sit, the more they attack spandex and the dyes that give your briefs their color. A 30-second rinse in cool water stops most of that damage before it starts.

If you are at a public pool or beach, rinse in the shower while you are still wearing the briefs, then change. This removes the heaviest concentration of chemicals before the fabric dries and traps them against the fibers.

Hand Washing vs. Machine Washing

Hand washing is the safer default for any swim brief, especially one with a high spandex content. Fill a sink with cool water, add a capful of mild liquid detergent, and gently squeeze the fabric for about a minute. Do not wring or twist it.

If you must use a machine, place the briefs in a mesh laundry bag, choose a cold, delicate cycle, and skip the spin cycle. The agitation and heat of a normal cycle are what cause waistbands to lose snap and linings to pill.

Drying Without Damaging the Stretch

Lay the briefs flat on a clean towel, reshape them with your hands, and let them air dry away from direct sun. High heat from a dryer or a hot car dashboard breaks down elastic fibers, so the waistband goes slack long before the fabric wears out.

If you need them dry faster, roll the briefs in a dry towel and press gently to absorb water, then hang them in a shaded, ventilated spot. Never hang them by the waistband with clips, which stretches it out of shape.

What to Avoid: Sunscreen, Rough Surfaces, and Hot Tubs

Sunscreen, tanning oil, and body lotion can stain light-colored briefs and leave an oily film that holds dirt. Apply sunscreen, let it absorb fully, then put on your swimwear. For white or light briefs, this one habit prevents most yellowing.

Hot tubs and heated pools are harder on swimwear than cool water because heat accelerates chemical breakdown. If you use them often, rinse immediately afterward and consider rotating between two pairs so each one gets a longer recovery between wears.

Swim Brief Care Routine: Step by Step

Step 1: Rinse immediately after every swim: Use cool water to flush out chlorine, salt, and sunscreen before they set. Rinse while still wearing the briefs if you are at a public shower. Checkpoint: the water should run clear, not slippery or soapy.
Step 2: Wash by hand with mild detergent: Fill a sink with cool water, add a small amount of gentle liquid soap, and squeeze the fabric gently for about a minute. Avoid bleach, fabric softener, and hot water. Mistake to avoid: wringing or twisting, which stretches the waistband and lining.
Step 3: Rinse and press out excess water: Rinse thoroughly until no suds remain, then press the briefs between your palms or roll them in a clean towel. Do not twist. Checkpoint: no detergent residue left, since it can irritate skin and attract dirt.
Step 4: Air dry flat in the shade: Lay the briefs flat on a towel or drying rack away from direct sun and heat. Reshape the waistband and leg openings with your hands. Mistake to avoid: using a dryer or hanging by the waistband, both of which shorten the life of the elastic.
Step 5: Store dry and separate: Once fully dry, fold and store in a drawer away from rough surfaces or sharp objects. Never store swimwear damp, which encourages odor and mildew. Next step: rotate between at least two pairs so each one gets a full rest between wears.

Fabric and Construction Notes That Affect Care

JUSTIN+SIMON Men's Underwear XSJ13 Cheeky Bulge Boxer Color: Made from 78% nylon and 22% spandex with a soft stretch fabric. High spandex content means this pair benefits most from hand washing and air drying, since heat and agitation are what degrade stretch fibers.
Mundo Unico Men's Underwear 26020100122 Sedoso Trunks Color 00-White: Features breathable mesh side panels and a supportive trunk cut. Mesh panels dry quickly but can snag, so keep them out of a machine drum and away from Velcro or zippers in the wash.
CandyMan Men's Underwear 99873 Seawater Trunks Color Multicolor Print: Made from soft, breathable black mesh with an all-over print and a low-rise cut. Printed mesh can fade or crack if washed in hot water or dried in sunlight, so cool rinses and shade drying protect the pattern.