There's something special about the transition from summer to fall. The days are still warm, but the mornings are cooler. Windows left open at night can bring in a crisp breeze, while the afternoon may still feel unmistakably like summer.
For parents, that change in temperature can bring an important question at bedtime:
What should my baby wear to sleep?
When temperatures begin to fluctuate, the goal isn't simply to add more layers. Baby sleepwear should be comfortable, breathable, appropriately fitted, and suited to the temperature of the room.
For many families, this makes the transition from lightweight summer sleepwear to soft, breathable long-sleeved pajamas an easy one. Fabrics like bamboo viscose can be especially appealing during this in-between season because they're soft against baby's skin and designed to feel comfortable across changing temperatures.
Here's how to dress your baby for sleep as summer gives way to fall, and how to create a warm, inviting sleep environment that doesn't get too hot.
How Should a Baby Dress for Sleep?
Before choosing pajamas, consider the temperature of the room, rather than simply the temperature outside.
Your baby's room might feel very different from the rest of the house, particularly if you use air conditioning, a fan, a heater, or keep the windows open overnight.
The American Academy of Pediatrics recommends keeping babies from getting too hot and generally dressing them in no more than one additional layer than an adult would comfortably wear in the same environment. Signs that a baby may be too warm can include sweating or a chest that feels hot.
A good approach is to think in terms of simple, breathable layers rather than bundling your baby up.
Keep in mind: every baby and every home is different. Use your baby's comfort and the room's conditions as your guide.
What Should a Baby Wear to Sleep in Summer?
During the warmest part of summer, babies generally need less clothing for sleep.
If the room is warm, a lightweight short-sleeve snap bodysuit or similarly lightweight sleepwear may be all that's needed, depending on your baby's age, the room temperature, and what feels comfortable for them.
For babies who tend to get warm while sleeping, breathable fabrics can make a noticeable difference in comfort.
Be on the lookout for:
- Lightweight, breathable fabric
- Soft materials that feel gentle against a baby's skin
- Comfortable, non-restrictive fit
- Minimal layering in warm rooms
- Sleepwear appropriate for your baby's size and age
This is one reason many parents reach for bamboo viscose during the warmer months. Its soft, lightweight feel makes it a natural choice for summer sleepwear.
Earthly Threads' snap bodysuits can be an easy summer-to-fall staple because they can be worn on their own during warmer nights and layered as temperatures begin to drop.
What Should a Baby Wear to Sleep in Early Fall?
Early fall is where things get a little trickier.
You may have a 75-degree afternoon followed by a much cooler night. One evening might call for lightweight sleepwear, while the next might feel more like pajama weather.
Instead of completely changing your baby's sleepwear wardrobe, think about a gradual transition.
For warm evenings, try:
Lightweight pajamas or a short-sleeved option.
For cooler evenings, try:
Long-sleeve pajamas with breathable fabric.
For a cool room, try:
A long-sleeve one-piece or two-piece pajama set, depending on your baby's age and what is appropriate for their sleep environment.
The key is flexibility.
A comfortable, long-sleeved pajama set is a great choice for fall because it offers good coverage without the need for thick, heavy clothing.
Why Bamboo Pajamas Are Perfect for the Summer-to-Fall Transition
The transition between seasons is exactly when fabric choice becomes important.
Bamboo viscose is known for its soft, smooth feel, breathability, moisture-wicking properties, and temperature-regulating characteristics. Those qualities make it particularly well suited to a season when temperatures don't always know what they're doing.
For babies, softness matters, too. Their skin is delicate, and pajamas are in contact with their skin for hours at a time.
That's why we designed Earthly Threads baby sleepwear around one simple idea:
Comfort without compromise.
Our bamboo baby pajamas are made to bring together the softness parents want, the breathability babies need, and the elevated feel Earthly Threads is known for.
Bamboo baby sleepwear can offer:
A buttery-soft feel
Gentle fabric makes bedtime feel a little more comfortable.
Breathability
Sleepwear made from breathable material can help prevent overheating and the feeling of being heavy or stuffy.
Moisture-wicking comfort
Bamboo viscose can help wick moisture away from the skin, which can be especially welcome during warmer nights.
Temperature-regulating comfort
Bamboo's ability to regulate temperature stems from its unique microscopic fiber structure. To make the seasonal change more comfortable, breathable sleepwear can be a better choice than immediately reaching for thick pajamas as fall approaches.
Stretch and flexibility
Babies move, wiggle, crawl, roll, and stretch. Their pajamas should be able to move and grow with them.
Which Baby Pajamas Should You Choose?
Earthly Threads offers several baby pajama styles, so you can choose based on your baby's age, your routine, and the temperature in their room.
Snap Bodysuits
Snap bodysuits are an especially versatile option for younger babies.
They're easy to put on, easy to change, tagless, and can work beautifully during the warmer part of the summer-to-fall transition.
On warmer nights, a lightweight bodysuit may be all your little one needs. As temperatures cool, it can also become a comfortable base layer.
Best for: warmer nights, layering, younger babies, and easy changes.
Long Zip Rompers
When temperatures start dropping, a long zip romper can provide a little more coverage without requiring multiple pieces.
And for parents, there's the added benefit of a zipper. No searching for tiny snaps in the middle of a nighttime diaper change.
Earthly Threads long zip rompers are designed with everyday baby life in mind: soft, comfortable, and easy to wear from bedtime through those inevitable middle-of-the-night wake-ups. They feature dual zippers, fold-over mitts, and fold-down cuffs to make things that much easier for parents.
Best for: cooler nights, fall bedtime routines, and easy nighttime changes.
(Featured: Versatile Zip Romper)
Two-Piece Pajama Sets
As your little one grows, two-piece pajamas can become a favorite.
A soft long-sleeve top paired with coordinating bottoms provides coverage while still allowing plenty of movement.
They're also an easy option for parents who want pajamas that transition seamlessly from bedtime to slow mornings at home.
Best for: older babies and toddlers, cooler fall nights, and flexible everyday wear.
(Featured: Victorian Rose Two-Piece)
Don't Forget the Crib Sheet
Baby's sleepwear isn't the only thing that matters when temperatures change.
The crib sheet is the layer your baby sleeps directly against, so choosing a soft, breathable sheet can be an important part of creating a comfortable sleep environment.
Earthly Threads crib sheets are made from the same luxuriously soft bamboo fabric families love in our baby pajamas.
Pair a bamboo crib sheet with breathable bamboo pajamas for a soft, cozy sleep space without relying on loose blankets or extra bedding.
And when it comes to safe sleep, remember that the American Academy of Pediatrics recommends using a firm, flat sleep surface with a tight-fitting, fitted sheet and keeping loose bedding, pillows, blankets, and other soft objects out of the crib.
(Featured: Earthly Threads Bamboo Crib Sheets, Essential Snap Bodysuit, & Everyday Robe)
A Simple Summer-to-Fall Baby Sleepwear Guide
| Room feels… | Consider… |
|---|---|
| Warm | Lightweight, breathable sleepwear |
| Comfortable | A single breathable pajama layer |
| Starting to cool | Long-sleeve pajamas |
| Cool | A comfortable long-sleeve pajama option appropriate for baby's size and sleep environment |
| Changing throughout the night | Breathable pajamas that allow you to adjust layers appropriately |
Remember: These are general guidelines, not strict temperature rules. Babies can respond differently to temperature, so check your baby's chest and overall comfort rather than relying solely on a thermometer. To avoid overheating, the AAP recommends dressing a baby in a similar amount of clothing as an adult, plus one additional layer.
How Can You Tell if Your Baby Is Too Hot?
When you're worried about whether your baby is warm enough, it can be tempting to keep adding layers. But more isn't always better.
Instead, check your baby's chest or torso. According to the AAP, sweating or a hot chest can be signs that a baby is too warm.
If your baby feels hot or sweaty, consider removing a layer.
Other things to keep in mind:
- Don't rely on cold hands or feet alone to determine whether your baby is cold.
- Avoid overdressing.
- Don't wear a hat indoors for routine sleep.
- Keep loose blankets and bedding out of the crib.
- Choose sleepwear appropriate for your baby's size and age.
- Follow the manufacturer's and pediatrician's recommendations for sleepwear and sleep products.
A Note About Baby Sleepwear Safety
Comfort is important, but safety always comes first.
In the United States, children's sleepwear is subject to federal flammability requirements. Depending on the garment's size and construction, sleepwear must meet applicable flammability standards or qualify under the rules for snug-fitting sleepwear.
That's another reason parents should choose sleepwear specifically designed and marketed for sleep rather than simply putting a baby to bed in oversized everyday clothing.
Furthermore, every year, parents unknowingly dress their babies in pajamas and sleepwear laced with toxins, from flame retardants to carcinogenic dyes, all while assuming federal regulations protect them. But the truth of the matter is that these toxins are still very present in baby clothing, and your baby's health could be at risk.
| Toxin | Where It’s Found | Health Risks | How to Avoid It |
|---|---|---|---|
| Formaldehyde | Wrinkle-resistant finishes, dyes | Carcinogen, skin irritation, respiratory issues | Look for OEKO-TEX® Standard 100 or GOTS-certified fabrics |
| AZO Dyes | Brightly colored prints, synthetic fabrics | Carcinogenic aromatic amines, allergies, eczema | Avoid cheaply made pajamas (especially from Amazon third-party sellers) |
| Phthalates | Plastic snaps, zippers, synthetic prints | Endocrine disruption, developmental issues, asthma | Choose bamboo or organic cotton with non-plastic closures |
| Lead & Heavy Metals | Dyes, prints, imported fabrics | Neurotoxicity, developmental delays, cognitive impairment | Stick to U.S.-made or GOTS-certified brands |
| Perfluorinated Chemicals (PFCs) | Water-resistant coatings (e.g., “stain-proof” pajamas) | Immune system damage, hormone disruption | Avoid “stain-proof” or “water-resistant” claims unless PFC-free is stated |
| Chlorine Bleach Residue | Conventionally processed cotton | Skin irritation, respiratory issues | Choose OEKO-TEX® or GOTS-certified organic cotton or bamboo |
When shopping for baby pajamas, always check the manufacturer's sizing, safety information, and care instructions.
Check out this step-by-step guide on How to Reduce Toxins In Your Bedroom.
Safe Sleep Starts with Safe Fabric
As a parent, every decision—from room temperature to fabric choice—plays a role in your baby’s safety and comfort. While the seasonal shift from summer to fall is exciting, it’s also a reminder to reassess your baby’s sleepwear for toxins, breathability, and fit.
At Earthly Threads, we believe baby sleepwear should be as safe as it is soft. That’s why we rigorously test our bamboo fabrics, avoid harmful chemicals, and prioritize certifications like OEKO-TEX® Standard 100.
Ready to Upgrade Your Baby’s Sleepwear?
Explore our non-toxic, temperature-regulating bamboo pajamas—designed for safe, comfortable sleep all year round.
