How to Wash Workout Clothes? | Keep Gear Fresh Longer

Nothing kills a good workout routine faster than gear that comes out of the wash still smelling like yesterday’s session. The way you clean performance fabrics matters more than most people realize — get it wrong and you’ll trap odors, stretch out the elastic, and ruin the moisture-wicking tech you paid good money for. The good news? Doing it right takes about five extra seconds of effort per load.

Why Workout Clothes Need Special Treatment

Technical fabrics — the polyester, nylon, and spandex blends in most activewear — are engineered to pull sweat away from your skin and dry quickly. That same engineering makes them cling to body oils and bacteria in ways cotton doesn’t. If you wash them like regular clothes, the buildup gets baked in.

The other culprit is what you add to the wash. Fabric softener and dryer sheets coat synthetic fibers with a waxy residue that clogs the moisture-wicking pores. Your shirt still looks fine, but it stops doing its job.

The Right Way to Wash Activewear

Start with the care label — it’s the final word on any garment. From there, every major sportswear brand recommends basically the same routine: turn everything inside out, use cold water and the gentle cycle, and reach for a mild detergent without added softeners or brighteners.

Nike’s own care guidance spells out the details: air out sweaty clothes as soon as you take them off, keep similar fabrics together, and turn exercise clothing inside out before washing. For items that hold onto odors, soak them in 1 part white distilled vinegar to 4 parts cold water for 20–30 minutes before the wash. Tide, meanwhile, says to use the warmest water temperature your care label allows — cold-only labels are common on workout gear, and if the label says cold, follow it.

One more habit worth building: don’t let damp clothes sit bundled in a gym bag or hamper. Airing them out first cuts down on odor and mildew before the wash even starts.

Drying and Common Mistakes to Skip

Synthetics dry fast, so they don’t need heat. Consumer Reports recommends air-drying performance fabrics whenever possible; if you must use the dryer, pick the lowest heat setting. High heat breaks down spandex and nylon over time, which is why leggings and sports bras eventually lose their shape.

Beyond heat, the most common mistakes are all easy to avoid:

• Using fabric softener or dryer sheets. Several sources warn this damages synthetic performance materials — skip them entirely.
• Overloading the washer. Athletic garments need enough water and movement to actually come clean.
• Ignoring the care label. Some workout pieces are machine-washable and some aren’t; the label settles it.
• Bundling damp gear. Let sweaty clothes air out first to keep odors from setting in.

If your regular detergent isn’t cutting it on stubborn gym smells, you’re not alone — that’s the most common complaint about activewear care. If you’re ready to switch things up, our roundup of the best detergents for gym clothes breaks down which formulas actually tackle odor without wrecking technical fabrics.

What about the rest of the routine? Wash workout clothes promptly — leaving them crumpled in the hamper for days gives bacteria time to set in. Turn them inside out before the wash so the sweat-facing side gets the cleaning action. Cold water on the gentle cycle protects elastic fibers, and air-drying keeps everything fitting the way it did on day one. That’s the whole system.