How to Wash Leggings (and Stop Them Pilling): Washing, Drying, and Fixing Fuzz

A pair of leggings rarely dies from a single hole. It dies slowly: the inner thighs go fuzzy, the seat turns shiny and a little see-through, and the waistband stops snapping back. Most of that decline happens in the laundry, not at the gym. Friction, heat, and the wrong washing partners do more damage to stretchy knits than squats ever will.

The good news is that caring for leggings takes a few small habits, not special equipment. This guide covers why leggings pill and lose opacity, a step-by-step washing routine, how to dry them, how to remove pills safely, what to do about odor, how often to wash, and a quick reference table by fabric type. If you want the broader routine for everything in your gym bag, our guide to washing workout clothes covers shirts, sports bras, and outerwear too.

Why Leggings Pill and Lose Opacity

Pills are small balls of tangled fiber that sit on the surface of fabric. They form when the ends of fibers work loose from the yarn and rub against each other until they knot. Anything that creates friction speeds up the process, which is why pilling shows up first where leggings take the most rubbing: the inner thighs, the seat, and behind the knees.

Four things drive most of the damage:

• Friction in wear. Thighs rubbing together, sitting on rough benches, and sliding on gym equipment all abrade the surface. Some of this is unavoidable, but it is why the same pair pills faster when it is worn for lifting than for walking.
• Abrasion in the wash. A washing machine tumbles everything together. Leggings sharing a load with towels, jeans, or hook-and-loop fasteners get scrubbed by coarser fabrics for the length of the cycle.
• Heat. Hot water and high dryer heat stress spandex (also sold as elastane or Lycra), the fiber that gives leggings their stretch and recovery. Weakened spandex relaxes, the knit loosens, and a loose knit shows more skin when you bend.
• Residue. Too much detergent and any fabric softener leave a film on synthetic fibers. That film holds odor and can make the fabric feel slick and dull.

Opacity loss and pilling are related. As the surface fibers wear down and the knit relaxes, the fabric thins. Leggings that passed the squat test when new can start to show through at the seat after enough abrasion and heat. Our best squat-proof leggings guide explains what makes a knit opaque to begin with, and the care below is how you keep it that way.

How to Wash Leggings: Step by Step

Always start with the care label. Most activewear labels recommend cold water, a gentle cycle, and line drying, but some brands are stricter, and the label is the only instruction written for that specific fabric. When the label and a general guide disagree, follow the label.

1. Wash them soon, but not too hot

Sweaty leggings left balled up in a gym bag give odor-causing bacteria time to settle in. Hang them to air out if you cannot wash them the same day, and wash them within a day or so. Waiting does not cause pilling, but it makes odor harder to remove, which tempts people into hotter washes that do cause damage.

2. Turn them inside out

Turning leggings inside out puts the lining side against the drum and the other clothes, so the outer face, the side everyone sees, takes less abrasion. It also exposes the inside, where sweat and skin oils collect, directly to the water and detergent.

3. Zip them into a mesh laundry bag

A mesh laundry bag keeps leggings from rubbing directly against heavier items and stops waistband drawcords from tangling around other clothes. Do not overstuff it. Two or three pairs in a medium bag is plenty; the water and detergent still need to move through the fabric.

4. Wash with like fabrics

Sort by texture, not only by color. Leggings, sports bras, and synthetic tops can share a load. Towels, denim, fleece, and anything with Velcro or exposed zippers should go in a separate load. Towels are especially rough on leggings because they shed lint that clings to synthetic fibers and they are coarse enough to scrub the surface.

5. Choose cold water and a gentle cycle

Cold or cool water is enough to clean activewear with a modern detergent, and it is easier on spandex than hot water. Pick the gentle, delicate, or hand-wash cycle so the drum tumbles less aggressively and spins more slowly. A shorter cycle means less time for fibers to rub.

6. Use less detergent than you think

Measure to the lower end of the dose line. Synthetic fabrics do not hold much dirt, and excess detergent that does not rinse out stays in the fibers. If odor is a recurring problem, an activewear detergent formulated for synthetics is an option, but the bigger win is usually using less of whatever you already have.

7. Skip fabric softener and dryer sheets

Softener works by coating fibers. On leggings that coating traps sweat and odor, and it can interfere with how moisture-wicking fabrics move sweat off the skin. Dryer sheets do the same thing through heat. Leave both out of any load that contains activewear.

How to Dry Leggings

The dryer is where many leggings age the fastest. High heat stresses spandex, and the tumbling action adds another round of friction, so the best drying method is the gentlest one.

• Air dry flat or on a hanger. Lay leggings flat on a drying rack or drape them over a hanger by the waistband. Synthetic fabrics dry quickly, often within a few hours indoors.
• Keep them out of direct sun and off radiators. Strong sun can fade dark dyes over time, and direct heat from a radiator is no gentler than a dryer.
• If you must use the dryer, use the lowest heat setting or an air-only setting, keep the leggings inside out, and take them out while they are still slightly damp.
• Do not wring them. Press water out by rolling them in a dry towel if you want them to dry faster; twisting stretches the knit unevenly.

For storage, fold or roll leggings in a drawer. Hanging them by the waistband is fine for drying, but hanging for months at a time can stretch the waistband, especially on heavier fabrics.

How to Remove Pills From Leggings

Once pills form, washing will not remove them. You can take them off, though, as long as you work carefully. Stretchy knits are thinner than sweaters, so the goal is to remove the fuzz without cutting the fabric underneath.

1. Check the care label and fiber content. Very thin, sheer, or brushed "buttery" fabrics are the easiest to damage. If the leggings are expensive or delicate, be conservative.
2. Lay the leggings flat on a hard surface. Smooth out wrinkles so the fabric does not bunch into the blades.
3. Use a fabric shaver on its lowest setting. Most fabric shavers have a guard with adjustable depth or hole sizes. Start with the setting that keeps the blades furthest from the fabric.
4. Test a hidden area first, such as the inside of the waistband or the gusset seam allowance, before working on the thighs or seat.
5. Move lightly in small circles without pressing down. Let the guard glide over the surface and empty the lint catcher often.
6. Stop at seams and stretched areas. Do not shave over seams, and do not stretch the fabric tight while shaving, because a taut knit pushes up into the blades and can snag.

A lint roller or tape removes loose surface lint but will not lift tightly knotted pills. Avoid razors and pumice-style sweater stones on thin leggings; they cut or abrade the surface far more aggressively than a guarded shaver. And keep expectations realistic: removing pills improves how leggings look, but it cannot restore fabric that has already thinned.

What About Odor?

Synthetic fibers like nylon and polyester are great at moving sweat but are also good at holding onto body oils, which is where lingering gym smell comes from. Cold, gentle washes are kind to the fabric, but they are not always enough on their own to clear built-up odor.

If your leggings smell as soon as you start sweating, even straight out of the wash, the fabric likely has residue buildup. Cutting back on detergent and dropping fabric softener is the first fix. For stubborn cases, our guide to removing sweat smell from gym clothes walks through soaking and pre-treatment methods in detail, including the gentler options that suit stretchy fabrics. Our fabric guide to polyester, nylon, and merino explains why some fibers hold odor more than others.

How Often Should You Wash Leggings?

Wash leggings after every sweaty workout. Sweat, skin oils, and bacteria sit against the body in a snug garment, and letting them build up is what makes odor stick. For a pair worn for a short walk or around the house without much sweating, airing them out and wearing them again before washing is reasonable.

Rotating between two or three pairs helps too. Each pair spends less time in the wash, and fabric gets a rest between wears, which is easier on spandex than wearing and washing the same pair daily.

Care by Fabric Type

Leggings are rarely one fiber. Most are a blend of a main fiber with spandex for stretch, and the main fiber changes what matters most in care.

Fabric	Typical feel	Do	Don't
Nylon/spandex	Smooth, cool, often compressive	Wash cold, inside out, in a mesh bag; air dry	Use high dryer heat or softener
Polyester/spandex	Slightly slick, very quick-drying	Wash cold with a light detergent dose; air dry	Overdose detergent; wash with towels
Brushed "buttery" knits	Very soft, peachy surface	Use the gentlest cycle and a mesh bag; lay flat to dry	Tumble dry; shave pills aggressively
Cotton blends	Soft, breathable, less wicking	Wash cold or cool; reshape and air dry	Use hot water, which can shrink cotton
Any legging with mesh panels or bonded seams	Varies	Mesh bag, gentle cycle, air dry	Wring, iron, or use high heat

Brushed, ultra-soft fabrics feel luxurious because their surface fibers are raised, and those raised fibers are exactly what pills most easily. They need the most gentle care. The softness trade-offs are covered in our CRZ YOGA vs Lululemon and Lululemon Align vs Wunder Train comparisons, which are worth reading before you buy a pair you plan to wear hard. For the basic differences between cotton and synthetics, see our cotton vs polyester workout clothes guide.

Where This Advice Comes From

This is a care guide, not a lab or wear test. The routine above follows the conventions printed on most activewear care labels (cold wash, gentle cycle, no softener, line dry) and the fiber properties explained in this site's fabric guides linked throughout. Where brands give different instructions for a specific garment, the care label wins. Tools are linked as Amazon searches rather than specific products because we could not verify individual listings for this guide on publication day.

Frequently Asked Questions

Can you put leggings in the dryer?

It is best not to. High heat stresses spandex, which can make leggings lose stretch and recovery, and tumbling adds friction that encourages pilling. If you need to use a dryer, choose the lowest heat or air-only setting and remove them while still slightly damp.

Why do my leggings pill between the thighs?

That is where they take the most friction. Thighs rub together with every step, and that abrasion loosens surface fibers that knot into pills. Softer, brushed fabrics pill fastest there. Gentle washing slows it down, and a fabric shaver on a low setting can remove pills that have formed.

Should you wash leggings inside out?

Yes. Turning them inside out protects the outer surface from abrasion against the drum and other clothes, and it puts the sweatier inside face in direct contact with water and detergent.

Is fabric softener bad for leggings?

For most activewear, yes. Softener coats fibers, which can trap odor and interfere with moisture-wicking. Skip it, along with dryer sheets, in any load with leggings, sports bras, or technical tops.

How do you get pills off leggings without ruining them?

Lay the leggings flat, use a fabric shaver on its lowest setting, test a hidden area first, and move lightly without stretching the fabric or pressing down. Avoid razors and sweater stones on thin knits, and stay away from seams.

Can pilled leggings become squat-proof again?

Removing pills improves the look, but it cannot rebuild fabric that has thinned from abrasion or heat. If leggings have become see-through at the seat, it is usually time to retire them to lounge wear.

The Bottom Line

Leggings last longest when laundry is as gentle as possible. Turn them inside out, zip them into a mesh bag, wash cold on a gentle cycle with a light dose of detergent and no softener, keep them away from towels and denim, and let them air dry. Those habits slow pilling, protect the stretch, and keep the fabric opaque for longer.

When pills do appear, a fabric shaver on its lowest setting, used lightly on a flat surface after a test patch, cleans them up without much risk. And whenever a care label says something different from this guide, trust the label.