How to Wash Leggings Without Damaging the Stretch

Quick answer

Wash leggings inside out in cold water on a gentle cycle with mild detergent, then air dry flat or hang to dry. Avoid hot water, fabric softener, and the dryer—these break down elastane fibers and cause stretch loss. For best results, wash after every 1–2 wears and treat stains promptly.

Leggings are a staple in any active wardrobe, but their stretchy comfort can fade if you wash them incorrectly. Heat, harsh chemicals, and rough tumbling are the main culprits behind saggy knees, baggy waists, and lost shape. The good news: a few simple habits can keep your leggings fitting like new for years.

In this guide, we'll walk you through a step-by-step process for washing activewear leggings, from sorting to drying. We'll also share common mistakes to avoid, so you can protect your favorite pairs—whether you're washing everyday leggings or high-performance styles like the Relair Leggings or Airwarm Fleece Signature Leggings.

Why Leggings Lose Their Stretch

Most leggings contain elastane (often called Spandex or Lycra) to provide stretch and recovery. Elastane is sensitive to heat, chlorine, and oils from fabric softeners. When exposed to high temperatures or harsh chemicals, the fibers degrade and lose their ability to snap back, leaving you with stretched-out leggings.

Even frequent washing with the wrong detergent can strip away elasticity over time. That's why it's important to use a gentle, pH-neutral detergent and avoid anything that coats the fibers, like fabric softener or dryer sheets. The way you dry your leggings matters just as much: high heat in the dryer is one of the fastest ways to ruin stretch.

• Check the care label first—some leggings have specific instructions.
• When in doubt, treat all stretch fabrics as delicate.

Step-by-Step: How to Wash Leggings

Start by turning your leggings inside out. This protects the outer surface from pilling and abrasion, and helps clean the inner side where sweat and oils accumulate. Use a mesh laundry bag if you're washing them with other items. Sort by color and fabric weight to avoid zippers or hooks snagging the stretch material.

Choose a cold water setting (below 30°C / 85°F) on a gentle or delicate cycle. Add a small amount of mild liquid detergent—never use bleach or fabric softener. If your machine has an extra rinse option, use it to remove all detergent residue. For hand washing, fill a basin with cool water, add detergent, and gently squeeze the leggings without wringing or twisting.

• Wash similar fabrics together to reduce friction.
• Skip the fabric softener—it leaves a coating that traps odors and reduces stretch.

Drying Leggings Properly

After washing, gently press out excess water with a clean towel—do not wring. Lay your leggings flat on a drying rack or hang them over a shower rod. Avoid direct sunlight and heat sources like radiators, which can damage elastane. If you must use a dryer, choose the lowest heat setting and remove while slightly damp, but air drying is always safer.

Hanging leggings by the waistband can stretch them out over time. Instead, fold them over a hanger or lay flat. Make sure they're completely dry before storing to prevent mildew. Proper drying is a key part of leggings fabric care and will help keep leggings stretchy.

• Never put leggings in a hot dryer—heat is the enemy of stretch.
• Air dry indoors or in a shaded area to preserve color and elasticity.

Common Mistakes to Avoid

One of the biggest mistakes is using too much detergent. Excess soap leaves residue that attracts dirt and can irritate sensitive skin. Another is washing leggings with heavy items like jeans or towels, which can cause pilling and abrasion. Also, avoid washing leggings with velcro, zippers, or hooks that can snag the fabric.

Finally, don't let sweaty leggings sit in a hamper for days. Moisture and bacteria can break down fibers and cause odors. Wash them soon after wearing, especially if you've been sweating heavily. For more delicate styles like the Airywin Support Adjustable Bra or Light Running Vest, the same principles apply—always check the care label.

• Use only the recommended amount of detergent.
• Wash activewear separately from rough fabrics.

Your Leggings Washing Routine

1. Turn inside out and sort: Turn leggings inside out and separate from rough fabrics like denim or towels. Use a mesh bag if washing with other items. Checkpoint: No zippers or hooks in the same load.
2. Wash cold on gentle cycle: Use cold water (below 30°C) and a mild liquid detergent. Select a delicate or hand-wash cycle. Never use bleach or fabric softener. Checkpoint: Water should be cool to the touch.
3. Skip the fabric softener: Fabric softener coats fibers and reduces stretch. If you want extra softness, add a half-cup of white vinegar to the rinse cycle instead. Checkpoint: No softener in the dispenser.
4. Air dry flat or hang: Gently press out water with a towel. Lay flat on a drying rack or hang over a rod, avoiding direct sun and heat. Do not wring or twist. Checkpoint: Leggings are completely dry before storing.
5. Store folded, not hung: Fold leggings and store in a drawer. Hanging by the waistband can stretch them out over time. Checkpoint: Waistband retains its shape.

Product Care Notes

• Relair Leggings: Available in Colour, Size, and Length options. Different lengths may require slightly different drying methods—hang longer lengths to avoid creases.
• Airwarm Fleece Signature Leggings: Available in Colour, Size, and Length options. Fleece-lined leggings should be air-dried to maintain insulation and stretch; avoid heat.
• Light Running Vest: Breathable fabric keeps you fresh, with roomy pockets for your essentials. Streamlined fit reduces bounce for all-day comfort, even on long runs. This vest is designed for performance; wash it with similar care to your leggings to preserve breathability and fit.

With these simple steps, you can keep your leggings looking and feeling new for many seasons. Remember: cold water, mild detergent, and air drying are your best friends. For more specific care advice, always check the label on your andar leggings.