Can You Put Pillows in the Dryer? | What Works Safely

Most people toss pillows into the dryer without a second thought — until a pillow comes out lumpy, misshapen, or smelling like burnt rubber. The confusion is understandable. Pillows look similar on the outside, but what’s inside changes the rules completely.

The honest answer: polyester and down pillows handle machine drying well, while foam pillows do not. Knowing which category your pillow falls into is the difference between a fresh, fluffy pillow and a ruined one — or worse, a fire hazard in your laundry room.

Polyester and Down Pillows Can Handle the Dryer

Most standard bed pillows you find at big-box stores are filled with polyester fiberfill. These synthetic fills are heat-tolerant and respond well to machine drying, especially when you use a low-heat setting. Polyester pillows tend to clump as they dry, which is why adding a few clean tennis balls helps break up the filling and restore loft.

Down and feather pillows are also dryer-safe, though they require more patience. The outer fabric may feel dry within one cycle, but the inner down clusters trap moisture. Drying down pillows often takes three to four cycles on low heat to fully dry the core.

Never use high heat on any pillow — it can melt synthetic fibers or damage the delicate quills in feather pillows. A low-heat or air-dry setting is the safer choice for both types.

Why the Foam Confusion Sticks Around

Memory foam and latex pillows are the exception that catches most people off guard. These pillows feel durable and solid, so it’s tempting to assume they can survive a dryer cycle. The problem is that foam is highly flammable, and the tumbling heat inside a dryer — even on low — can cause internal damage or fire.

• Memory foam pillows: The foam structure breaks down under heat, and the material is a known fire risk in enclosed dryers. Machine drying is not recommended.
• Latex pillows: Natural and synthetic latex both degrade under high heat, losing their springiness. The dryer can also cause the latex to become brittle or crack.
• Shredded foam pillows: Even when the foam is cut into small pieces, the material remains flammable. The heat can cause clumping that is nearly impossible to reverse.
• Gel-infused foam pillows: The added gel layer does not make the pillow heat-safe. In fact, the gel can melt and spread inside the dryer.
• Buckwheat or hull pillows: These are not machine-washable or dryable to begin with and should be spot-cleaned and air dried only.

If you own a foam-based pillow, air drying is the only safe route. Hang it in a well-ventilated area or lay it flat on a drying rack, flipping occasionally. Avoid direct sunlight, which can also deteriorate foam over time.

How to Dry Pillows Without Damaging Them

The safest approach starts with checking the care tag — but if the tag is long gone, the fill type is your guide. Polyester, down, and feather pillows can go in the dryer with a low-heat or air-dry setting. Add two to three clean tennis balls or wool dryer balls to keep the filling from clumping as it tumbles.

Sleepfoundation’s detailed guide on polyester fill pillows confirms that synthetic fills handle machine drying well when heat is kept low. The same source stresses that the pillow must be completely dry before use — even slight dampness can lead to mold and mildew growth inside the fill.

Check dryness by squeezing the pillow in the center. If you feel any coolness or resistance, run another cycle. Pillows taken out while still damp will develop musty odors and may harbor bacteria over time.

If you’re unsure about your pillow type, squeeze the fabric — foam pillows feel dense and slow to spring back, while polyester pillows feel light and springy. That quick test can save you from a ruined pillow or a safety hazard.

Signs Your Pillow Should Not Go in the Dryer

Even if your pillow is technically dryer-safe, some pillows are past the point where machine drying makes sense. If the fabric is torn, the filling is lumpy beyond repair, or the pillow has visible stains that washing didn’t remove, the dryer won’t fix the underlying problem.

1. Check for tears or weak seams. The tumbling action can rip open a damaged casing, sending filling everywhere and potentially clogging your dryer vent.
2. Look for yellowing or odors. Trapped body oils and sweat can bake into the fabric under heat, setting stains and smells rather than removing them.
3. Feel for permanent lumps. If the filling is already clumped into hard balls, drying won’t redistribute it. Those pillows are ready for replacement.
4. Consider age. Most pillows should be replaced every one to two years. An old pillow that’s flattened or misshapen won’t recover from a dryer cycle.

When in doubt, hand washing and air drying are the gentler fallback. Some pillows with delicate fabrics or special inserts — like those with cooling gel layers — are best cleaned with a damp cloth and left to dry naturally.

What About Sanitizing Pillows in the Dryer?

Many people turn to the dryer to kill dust mites, bacteria, or allergens without washing the pillow first. The idea makes sense: high heat is known to kill dust mites. But the risk of damaging the pillow or creating a fire hazard makes this approach tricky for certain fills.

Per the foam pillows flammable warning from Dropps, never attempt to sanitize memory foam or latex pillows in the dryer. The heat needed to kill pathogens is far above the safe threshold for these materials. For polyester and down pillows, a 20- to 30-minute cycle on high heat can reduce dust mites, but only if the pillow is completely dry going in — moisture plus heat creates a breeding ground for bacteria instead.

A better approach for foam pillows is to use a vacuum with a HEPA filter on the surface, or to launder the removable pillow cover regularly. For all pillow types, washing every three to six months with a gentle detergent and drying properly is more effective for hygiene than relying on heat alone.

The Bottom Line

Most pillows can go in the dryer — provided you know the fill type and use the right heat setting. Polyester and down pillows dry well on low heat with tennis balls to prevent clumping. Memory foam and latex pillows should never see the inside of a machine dryer due to fire risk, and they require air drying instead.

If your pillow’s care tag is missing and you cannot identify the fill, stick with air drying to be safe. A quick check with your hand or a squeeze test can tell you a lot — and when in doubt, a replacement pillow is cheaper than a dryer repair or a safety scare.