how to wash leggings

Leggings are easy to ruin in the laundry. Too much heat and the fabric stretches out permanently. Too much friction and they pill. The wrong detergent or fabric softener breaks down the elastic fibers. After a few wrong washes, your $100 Lululemon leggings look old and feel baggy at the waist.

The good news: washing leggings correctly is straightforward once you know the rules. Here's exactly what to do — and what to avoid.

Quick Answer: How to Wash Leggings

• Water temperature: Cold only. Never warm or hot.
• Cycle: Gentle or delicate.
• Detergent: Small amount of mild detergent. No fabric softener.
• Turn inside out: Always, before washing.
• Dry: Air dry flat or hanging. Never put in the dryer.
• Frequency: After every workout. Every 2-3 wears for casual use.

Why Leggings Need Special Care

Most leggings are made from spandex/elastane blends (typically nylon-spandex or polyester-spandex). These synthetic fibers give leggings their stretch, compression, and moisture-wicking properties — but they're sensitive to heat, harsh detergents, and certain fabric care products.

What Heat Does to Leggings

Spandex (elastane) degrades with heat exposure. The heat breaks down the elastic fibers, causing the waistband to stretch out, the fabric to lose its compression, and the leggings to bag at the knees. Once elastic fibers break down, the leggings can't be restored — there's no way to tighten stretched-out spandex.

What Fabric Softener Does to Leggings

Fabric softener coats fibers with a waxy film that reduces their ability to wick moisture. On athletic leggings, this means they lose their sweat-wicking performance. The fabric also becomes less breathable over time. Skip fabric softener entirely for all athletic wear.

Why Pilling Happens

Pilling (those small fuzzy balls on the surface) is caused by friction — fabric rubbing against itself or against other fabrics in the wash. Turning leggings inside out reduces pilling by keeping the outer surface away from friction during the wash cycle.

Step-by-Step: How to Wash Leggings in the Machine

1. Turn leggings inside out. This protects the outer surface from friction and pilling, and also means the sweat-exposed interior is directly exposed to the wash water.
2. Use a mesh laundry bag. A mesh laundry bag provides an extra layer of protection against abrasion, especially if washing with other clothing like jeans or zippers.
3. Wash on cold, gentle cycle. Cold water only — no exceptions. Use the delicate or gentle setting to reduce agitation.
4. Use a small amount of mild detergent. About half of what you'd normally use. Detergent buildup in synthetic fabrics traps odors over time. An athletic-wear specific detergent (like HEX or Win Sport Detergent) works especially well for workout leggings.
5. Skip fabric softener and dryer sheets. Both harm moisture-wicking performance.
6. Wash with similar fabrics. Pair leggings with other athletic wear, not with heavy denim, towels, or rough fabrics.

How to Dry Leggings

Air drying is always the right choice for leggings. This is non-negotiable if you want them to maintain their shape and compression long-term.

Air Drying Options

• Hang dry: Hang leggings from the waistband on a drying rack or hanger. They dry within 2-4 hours at room temperature.
• Lay flat to dry: For leggings with thicker waistbands or structured compression panels, laying flat is better to prevent the waistband from stretching under its own weight.

Can You Put Leggings in the Dryer?

No — at least not on heat. If you absolutely must use a dryer, use the air-only / no-heat setting and remove them as soon as they're done. Even low heat accelerates spandex degradation over repeated cycles. Air drying extends the life of leggings by years.

How to Remove Odors from Workout Leggings

Workout leggings can hold onto sweat smell even after washing because synthetic fibers trap bacteria inside the fabric structure. Standard cold-water washing sometimes isn't enough.

Methods That Work

• Enzyme-based sport detergent: Products like Win Sport, HEX Performance, or Sport Suds are specifically formulated to break down the bacteria and sweat compounds that cause persistent athletic wear odors. Worth the investment if you work out regularly.
• Soak in cold water + white vinegar: Before washing, soak leggings for 30 minutes in cold water with half a cup of white vinegar. The acid neutralizes odor-causing bacteria. Wash normally afterward — the vinegar smell washes out completely.
• Don't use hot water to kill odor: Hot water does kill bacteria, but it also damages spandex. The vinegar soak or enzyme detergent are better options.

Care for Specific Legging Brands

Lululemon Leggings

Lululemon recommends cold machine wash, inside out, with like fabrics. Their Luon, Luxtreme, and Nulu fabrics are all spandex blends that follow the same rules: cold water, no heat drying, no fabric softener. Lululemon's official care guide also says to avoid extended sun exposure when air drying (UV degrades spandex).

Athleta Leggings

Similar care to Lululemon. Cold wash, gentle cycle, air dry. Athleta's PowerVita and Powervita fabrics include spandex; treat them identically to other athletic wear.

Amazon/Generic Leggings

Same rules apply regardless of price point. All spandex-blend leggings degrade with heat. Cold wash, air dry, no fabric softener — whether they cost $15 or $150.

Common Legging Laundry Mistakes

• Washing in warm or hot water: The single most damaging thing you can do to leggings long-term.
• Using fabric softener: Destroys moisture-wicking performance.
• Putting them in the dryer: Accelerates spandex breakdown significantly.
• Washing right-side out: The outer surface gets abraded. Always inside out.
• Washing with rough fabrics: Zippers and rough denim cause pilling.
• Using too much detergent: Residue buildup in synthetic fibers traps bacteria and causes persistent odor.

Frequently Asked Questions

How often should you wash leggings?

Workout leggings should be washed after every wear — sweat creates the perfect environment for bacteria to grow, and waiting leads to persistent odor. Casual leggings worn for light activity can go 2-3 wears before washing.

Why do my leggings get baggy after washing?

Almost always caused by heat exposure. Washing in warm water or putting leggings in a heated dryer — even once — degrades the spandex fibers and causes permanent stretching. Unfortunately once this happens, the elasticity can't be restored.

Can you wash leggings with jeans?

Not ideal. Denim is rough and heavy, and jeans can cause pilling on leggings during the wash cycle. Wash leggings with similar lightweight athletic wear or use a mesh laundry bag if you have to mix them.

How do you get white residue out of leggings?

White residue is usually detergent buildup from using too much detergent. Rewash with no detergent on a cold cycle, or add a cup of white vinegar to the rinse cycle. Going forward, use less detergent — for athletic wear, even less than the recommended amount is often sufficient.

What's the best detergent for leggings?

For everyday leggings: any mild liquid detergent used in a small amount. For workout leggings with odor issues: a sport-specific enzyme detergent like Win Sport Detergent or HEX Performance Detergent. Both are formulated specifically to eliminate sweat-based odors from synthetic athletic fabrics.