How to wash workout clothes

Typical machine settings

The elastane in leggings, sports bras, and compression gear is the most heat-sensitive part: for anything tight-fitting, treat cold water and air drying as non-negotiable.

These settings match what our laundry checker uses. The garment's own care label always wins.

What workout clothes can usually be washed with

• Other activewear — synthetics wash best with synthetics.
• Everyday synthetics like regular clothes of similar weight, in cold on a gentle cycle.
• Athletic socks and synthetic underwear.

What to keep separate

• Towels — the worst partner: towel lint welds itself to wicking fabric, and towels want the hot, long washes activewear can't take.
• Fleece and other lint shedders, for the same reason.
• Jeans and anything with zippers or Velcro — hardware pulls threads out of smooth stretch knits.
• Anything needing warm or hot water — activewear's cold-wash requirement drags the whole load down, or the load's warmth damages the activewear.

Color considerations

• Most activewear is colorfast, but bright saturated pieces (especially reds) can tint a pale load when new — first washes with darks or alone.
• White or pale wicking fabric picks up dye readily; keep it away from new dark items.

Fabric considerations

• Polyester wicking fabric: tough in the wash, but it holds odor — turning garments inside out and not overloading the machine helps detergent reach the oils.
• Elastane/spandex blends (leggings, sports bras, compression): heat kills the stretch permanently; there is no fix once it's gone.
• Merino athletic layers are the exception in the drawer: wool rules apply — cold, gentle, no dryer, and their own label decides.

Drying

• Hang drying is the default: synthetics drip-dry fast, and every dryer cycle costs elastic life.
• If you tumble, use the lowest heat and pull items while slightly damp.
• Never high heat: it bakes in odor, melts fibers' crimp, and kills stretch.

Common mistakes

• Fabric softener — it coats wicking fibers, traps odor, and defeats the fabric. This is the number-one activewear mistake.
• Hot water to "kill the smell" — it sets odor into synthetics and damages elastic; an occasional sport-wash detergent or a white-vinegar rinse works better.
• Leaving sweaty clothes balled in a gym bag overnight — odor bacteria do their work before the wash ever starts.
• Drying leggings and sports bras on high heat — the fit never recovers.

When the usual advice changes

• Heavily muddy gear (trail running, rugby): rinse the mud off first, then wash separately from lightly worn activewear on a normal cycle.
• Padded sports bras: remove inserts if they come out; wash bras in a mesh bag. See washing delicates.
• If a label explicitly allows warm water or tumble drying, the label wins — some looser polyester gear genuinely tolerates it.

Sources

• Established fiber and fabric care practice — Widely documented fabric-care knowledge. Well-established, uncontroversial properties of common fibers — e.g. cotton shrinks in heat, wool felts with agitation and heat, dark dyes can transfer when new, terry cloth sheds lint, microfiber attracts lint, elastics degrade in high heat. Used only for claims of this uncontroversial kind.
• Laundry Basics — Sorting it Out — American Cleaning Institute. Consumer guidance on sorting laundry by color, fabric, and lint behavior (whites separate; brights and darks by themselves; light synthetics pick up dark dyes). Used for sorting and color-separation guidance.