How to Wash Gym Clothes and Activewear Without Ruining Them

Activewear is the hardest category of clothing to get right in the wash. The same synthetic fabrics that make leggings stretchy and moisture-wicking also trap bacteria and break down under heat. Wash them wrong and you end up with clothes that smell even when they're clean — or that lose their shape after a few months.

Why Gym Clothes Smell Even After Washing

This is the most common complaint, and it has a specific cause. Synthetic fabrics like polyester, nylon, and spandex are hydrophobic — they repel water. That's great for wicking sweat away from your skin during a workout, but it means the fabric also resists water during the wash cycle. Bacteria and odor compounds get embedded in the fibers and the water doesn't fully flush them out.

The problem gets worse when you:

— Wash on hot (the heat sets odors instead of removing them)

— Use too much detergent (residue builds up in the fibers and traps bacteria)

— Leave wet gym clothes in a bag or hamper before washing (bacteria multiply fast in warm, damp fabric)

The Right Way to Wash Activewear

Turn everything inside out. Odor and bacteria live on the inside of the garment — where your skin was. Turning it inside out puts that surface in direct contact with the wash water.

Wash in cold water. Cold water is more effective than hot for synthetic fabrics. Hot water can break down elasticity and cause shrinkage in spandex blends.

Use less detergent than you think. More soap doesn't mean cleaner. Residue buildup is a major reason gym clothes stop smelling fresh. Use about half the recommended amount for activewear loads.

Skip the fabric softener entirely. Fabric softener coats fibers with a waxy residue that reduces moisture-wicking performance and traps odors over time. It's good for cotton towels, bad for athletic gear.

Air dry when possible. High heat in the dryer is the fastest way to break down elastic and degrade performance fabrics. Lay flat or hang to dry. If you must use a dryer, use the lowest heat setting and take them out while still slightly damp.

What Not to Do

— Don't ball up sweaty gym clothes and leave them wet — even a few hours gives bacteria time to multiply and embed in the fabric

— Don't dry on high heat — this degrades spandex quickly and is the main reason athletic gear loses its shape

— Don't use bleach — it breaks down synthetic fibers and elastic

— Don't wash with cotton on a hot cycle — a common mistake when tossing everything in together

Activewear That Needs Special Attention

Sports bras — these take the most wear and usually have the most elastic. Hand washing in cold water extends their life significantly. If machine washing, always use a mesh laundry bag to prevent straps and hooks from catching on other items.

Compression gear — leggings, compression socks, shorts with built-in liners. Cold wash, air dry only. Heat is what causes compression fabric to go loose over time.

Wool athletic gear (Merino base layers, running socks) — contrary to what most people expect, merino wool is machine washable, but it needs cold water and a gentle cycle. No dryer. Lay flat to dry.

Waterproof and water-resistant gear — washing actually refreshes the DWR coating, but only if you dry on low heat or with a tumble dryer on low. Avoid detergents with added softeners or fragrances.

How Pickup and Delivery Works for Gym Clothes

Green Clean handles activewear as part of standard wash and fold at $1.70/lb. If you have specific instructions for a load — cold wash, no dryer, inside out — you can add a note in the app when you place your order.

For New Yorkers who work out daily, the math works out well. A week of gym clothes for one person is typically 4–7 lbs, which comes to $7–12 to have professionally laundered, picked up at your door, and returned folded within 24 hours. Less than a single post-workout smoothie.

Schedule a 7–8am pickup and your clean gym clothes come back the same day — ready before your next morning workout.

Frequently Asked Questions

How do you get the smell out of gym clothes that won't go away?

Soak in a solution of one part white vinegar to four parts cold water for 30 minutes before washing. Vinegar breaks down the bacteria and odor compounds embedded in synthetic fibers. Then wash as normal on cold, inside out, with a small amount of detergent.

Can you put gym clothes in the dryer?

Most activewear should air dry. If you use a dryer, use the lowest heat setting and remove while slightly damp. High heat degrades spandex and elastic permanently.

How often should you wash gym clothes?

After every workout — no exceptions. Unlike jeans or a sweater you can wear a few times between washes, gym clothes have sweat embedded in the fibers after one use. Letting them sit makes the smell harder to remove.

Why do my leggings keep losing their shape?

Almost always heat. High-heat dryer cycles break down the spandex fibers that give leggings their stretch and compression. Switch to air drying and you'll notice a significant difference within a few weeks.

Green Clean Laundromat offers pickup and delivery laundry service across all of Manhattan. Wash and fold starts at $1.70/lb with no fees, no minimums, and free pickup and delivery. Your first order is free. Schedule at gclaundromat.com. Located at 981 Columbus Ave, Upper West Side.