How Long to Leave Pillows in the Sun: A Simple Way to Freshen Bedding Naturally

If your pillows are feeling a little musty, flat, or just overdue for a refresh, don’t rush to the washer just yet. Sometimes, all it takes is a sunny day.

Learning how long to leave pillows in the sun can do wonders for eliminating odors, drying out moisture, and even killing off dust mites and bacteria. Best of all—it’s free, chemical-free, and super easy.

Does Putting a Pillow in the Sun Work?

Yes, it absolutely does—when done correctly.

Benefits of Sun-Drying Pillows:

• Kills bacteria and dust mites with natural UV exposure.

• Eliminates musty odors caused by trapped moisture.

• Reduces allergens like mold and mildew from damp or sweaty pillows.

• Fluffs pillows naturally by helping air circulate through the fill.

Even if you wash your pillowcases regularly, the pillow itself can trap sweat, oils, and skin cells. Sun exposure helps clean what the washing machine often can’t.

We’ve made it a habit to air out the kids’ pillows outside on a sunny weekend, especially after cold season. It’s amazing how much fresher the whole room smells afterward. And with our Puffy Cloud Mattress’s washable cover, I can refresh the entire bed without needing a deep clean every week.

How Long to Put Pillows in Sun

The ideal amount of time depends on the season, fabric, and pillow type—but here’s a general rule:

Standard Sun-Drying Time:

• 2 to 4 hours of direct sunlight on each side is typically enough to dry out moisture and refresh the pillow’s surface.

• In hot, dry climates, 2 hours may be sufficient—especially in direct, midday sun.

• In cooler or humid areas, extend to 4+ hours for best results and consider placing pillows near a reflective surface (like light-colored pavement) to intensify warmth.

Tips to Maximize Sun Exposure:

• Place pillows on a clean, dry surface (outdoor bench, drying rack, clean towel on patio) to avoid dirt or uneven drying.

• Flip halfway through to ensure both sides are fully exposed to sunlight and air.

• Avoid placing pillows on dark surfaces that may cause overheating or retain moisture.

• Bring pillows in before sunset to avoid evening dampness and temperature drops that can lead to mildew.

• Consider placing pillows under a mesh laundry bag to keep insects, pollen, or pet hair from sticking while they air out.

Watch for These Warning Signs:

• Faded fabric from overexposure—especially on colored or patterned covers, which can lose vibrancy over time.

• Cracked or crunchy fill (especially in foam pillows) from too much heat, which can permanently alter pillow texture.

• Stiffened seams or warping, which could occur if the pillow was already wet and dried too rapidly in intense heat.

• Persistent damp spots, which suggest insufficient sun time or shaded placement—reposition and extend exposure if needed.

Is It Good to Put Pillows in the Sun?

Generally, yes—but there are a few caveats depending on your pillow’s fill and materials. Sun exposure can be incredibly beneficial for freshening up your pillows, but only if done thoughtfully.

Best Pillows for Sun Exposure:

• Feather or down: Excellent for airing out and reducing odor, just avoid long exposure that could dry out natural oils and reduce softness.

• Synthetic fill: Great for refreshing and safe in sunlight, especially for standard polyester pillows used in living rooms or bedrooms.

• Cotton and polyester covers: These materials can handle short bursts of sun without damage and often come back looking and smelling renewed after just a couple of hours.

Use Caution With:

• Memory foam pillows: Sunlight may break down the foam structure over time, leading to cracks or brittleness. Air in a shaded, breezy area instead.

• Silk or delicate fabric covers: These can discolor, lose their sheen, or become brittle with even minimal direct UV exposure. If they must be sun-dried, use indirect light and limit exposure to under an hour.

• Decorative pillows with embellishments: Beads, sequins, or metallic threads may warp or fade when left in harsh sun.

How Often Should You Sun-Dry Pillows?

• Every 2–4 weeks during spring and summer.

• After illnesses to reduce bacteria.

• Following deep cleanings to complete the drying process.

After we did a big cleanout of our guest room, I lined up all the throw pillows and decorative cushions on our back porch. The sun did its thing, and with a little fluffing and fresh pillow protectors, they felt brand new. Pairing them with our Puffy Lux Mattress really gave the whole space a boutique feel.

Sun-Drying Recommendations by Pillow Type

Tips for Fresher Pillows Year-Round

• Use washable pillow protectors to block sweat and oils.

• Fluff pillows daily to keep airflow moving.

• Wash pillows every 3–6 months, depending on use.

• Store extras in breathable cotton bags—not plastic bins.

Final Thoughts

Knowing how long to leave pillows in the sun is one of the easiest ways to freshen them up without harsh chemicals or constant washing.

Just a few hours in the sunlight can eliminate odor, kill allergens, and restore that fluffy, clean feeling.

With the right timing and precautions, it’s a quick and natural step to a healthier home and better sleep.