October is SIDS & Safe Sleep Awareness Month. This guide is here to help, not to scare you, and it is not medical advice. If you have questions about your own baby, your pediatrician is always the best person to ask.
If you have ever stood over the crib at 2 a.m. just to watch your baby's chest rise and fall, you are in very good company. Every parent does it. And the good news is that most of what keeps babies safe during sleep is simple, free and completely in your hands.
In 2024, about 3,400 babies in the United States died suddenly and unexpectedly, according to the CDC. Many of those deaths happened during sleep or in the baby's sleep area. That number is much lower than it was in the 1990s, and the biggest reason is that parents learned a few safe sleep habits and used them every single night.
This guide walks through those habits using the American Academy of Pediatrics (AAP) 2022 safe sleep recommendations, which the CDC also supports. Bookmark it, share it with grandparents and sitters, and come back whenever a new stage makes you wonder, "Wait, is this still okay?"
The short version: the ABCs of safe sleep
A is for Alone. Baby sleeps in their own space, with nothing else in it.
B is for Back. On their back, for every nap and every night.
C is for Crib. A firm, flat crib, bassinet or play yard that meets federal safety standards.
What SIDS and SUID actually mean
You will see two terms a lot, so here is what they mean in plain words.
SUID (sudden unexpected infant death) is the umbrella term. It covers any sudden and unexpected death of a baby younger than 1 year where the cause is not obvious before an investigation. The CDC groups SUID into three buckets. In 2024 there were 1,351 deaths from SIDS, 1,099 from unknown causes and 947 from accidental suffocation and strangulation in bed.
SIDS (sudden infant death syndrome) is one type of SUID. It is the name used when no cause can be found even after a full investigation.
Why does this matter to you? Because more than 1 in 4 of those deaths was accidental suffocation or strangulation in bed. That is the part a safe sleep space can prevent most directly: a clear crib, a firm mattress and a baby on their back.
1. Back to sleep, for every sleep
Place your baby on their back for every sleep until their first birthday. That includes naps, car-to-crib transfers and the 4 a.m. feed when you are too tired to think.
A few questions moms ask all the time:
- "What if my baby spits up?" Healthy babies have a natural reflex that protects the airway. Back sleeping does not raise the risk of choking.
- "What if they roll over on their own?" Once your baby can roll both ways (back to tummy and tummy to back), you can leave them in the position they choose. Keep placing them down on their back to start.
- "They sleep better on their tummy." They often do, and that is part of the concern. Tummy sleeping makes it harder for a young baby to wake up. Save tummy time for when your baby is awake and someone is watching.
2. A firm, flat surface (and why "inclined" is a red flag)
Your baby should sleep on a firm, flat mattress in a crib, bassinet, play yard or bedside sleeper that meets federal safety standards. The mattress should fit snugly, with no gaps at the sides, and be covered only by a fitted sheet made for that mattress.
"Flat" matters more than most people realize. A sleep surface with an incline of more than 10 degrees is no longer considered safe for infant sleep. The Safe Sleep for Babies Act, signed into law in May 2022, banned inclined sleepers for infants and banned padded crib bumpers across the United States.
That also means a few everyday baby items are not places for routine sleep:
- Car seats, strollers, swings and bouncers. If your baby falls asleep in one, move them to their crib or bassinet as soon as you can.
- Couches, armchairs and adult beds. Falling asleep with a baby on a sofa or recliner is one of the highest-risk situations there is. If you feel yourself dozing during a feed, put baby down in their own space first.
- Loungers, nests and pillows. Soft, padded "nest" products are not made for unsupervised sleep.
3. Bare is best: what belongs in the crib
The CPSC's rule of thumb is short and easy to remember: bare is best. A fitted sheet and your baby. That is it.
| Yes, in the crib | Keep out of the crib |
|---|---|
| A firm, flat mattress that fits snugly | Pillows, including "positioners" and wedges |
| A fitted sheet made for that mattress | Loose blankets, quilts and comforters |
| Your baby, on their back | Bumpers, including padded and vinyl bumper guards |
| A wearable blanket (sleep sack) if the room is cool | Stuffed animals and soft toys |
| A pacifier, with no strap or clip attached | Weighted blankets, weighted swaddles or weighted sleep sacks |
We know an empty crib can look a little lonely, especially in a nursery you spent months dreaming about. Put the cute quilt on the wall or over the rocking chair instead. Your baby will not miss it.
4. Room-share, but don't bed-share
The AAP strongly recommends that your baby sleep in your room, in their own crib or bassinet, for the first 6 months. Having baby close makes night feeds easier and lets you hear them.
Sharing the same bed is a different story. The AAP's 2022 guidance says bed-sharing is not recommended under any circumstances. The risk is higher when a baby is younger than 4 months, was born early, or when an adult in the bed has been drinking, smokes or takes medicine that makes them drowsy. Soft pillows and adult bedding add to the risk.
If you bring your baby into your bed to feed or comfort them, that is okay. Just put them back in their own sleep space before you fall asleep. A bedside bassinet makes that transfer much easier on a tired mom.
5. Keep baby comfortable, not hot
Overheating is linked to a higher risk of SIDS, and it is easy to do with good intentions. When it gets cold outside, our instinct is to bundle. For sleep, less is usually more.
- Aim for a comfortable room. Most families find 68–72°F (20–22°C) works well. Our room temperature chart shows what to dress baby in at every temperature.
- Skip the hats indoors. Babies release heat through their heads. The AAP advises against hats for sleep, except in the first hours after birth.
- Do the neck check. Feel the back of your baby's neck or their tummy. Warm and dry is just right. Sweaty or flushed means take off a layer. Cool hands and feet are normal and do not mean baby is cold.
- Nothing over the face or head. No blankets, no hoods, nothing that could slide up.
A breathable fabric helps here too. Many moms choose bamboo viscose for sleepwear because it feels cool and soft and lets heat escape more easily than heavier fabrics. You can read more in our guide to what bamboo viscose is.
6. Sleep sacks: the safe swap for a blanket
So how do you keep a baby warm without a blanket? With a wearable blanket, also called a sleep sack. It zips on over pajamas, cannot be kicked off onto the face and keeps arms free once your baby is past the swaddle stage.
Sleep sacks are rated in TOG (thermal overall grade), which tells you how warm they are. Here is a simple guide:
| TOG | Best for rooms around | Wear underneath |
|---|---|---|
| 0.5 | 75°F and up (24°C+) | Short-sleeve bodysuit or just a diaper |
| 1.0 | 69–74°F (21–23°C) | Short- or long-sleeve pajamas |
| 1.5 | 66–70°F (19–21°C) | Long-sleeve pajamas |
| 2.5 | 61–68°F (16–20°C) | Long-sleeve footed pajamas |
When you shop, look for three things: a sleep sack that fits (the neck and armholes should be snug enough that baby cannot slip down inside), no weights of any kind, and a TOG that matches your nursery. Our bamboo sleep sacks come in TOG options for every season, and prints like Butter Cloud and Honey Bear are easy to love all year. Check our size chart to pick the right fit.
7. Swaddling safely, and when to stop
Swaddling can help newborns settle, and it is fine when done safely:
- Always place a swaddled baby on their back.
- Keep the swaddle snug around the chest but loose at the hips, so the legs can bend up and out.
- Never use a weighted swaddle or put weighted objects inside one. The AAP says these are not safe.
- Stop swaddling as soon as your baby shows any sign of trying to roll, which usually happens around 3–4 months. A swaddled baby who rolls onto their tummy may not be able to push up or turn back.
The swaddle-to-sleep-sack switch can feel like a big step, but most babies adjust within a few nights. A lightweight bamboo swaddle works well in the newborn weeks, and a sleep sack takes over when those arms need to be free.
8. Other habits that lower the risk
Safe sleep is not only about the crib. The AAP also points to these protective habits:
- Breast milk, if you can. Feeding human milk is linked to a lower risk of SIDS. Any amount helps, and the protection is strongest with at least 6 months.
- Offer a pacifier at sleep time. If you are breastfeeding, many pediatricians suggest waiting until feeding is going well. If it falls out after baby is asleep, you do not need to put it back.
- Keep baby's air smoke-free. That includes cigarettes, vapes and marijuana, during pregnancy and after birth.
- Stay up to date on checkups and vaccines. Routine vaccines are associated with a lower risk of SIDS.
- Tummy time while awake. Supervised tummy time builds the neck and arm strength babies need to lift and turn their heads.
A quick word on home monitors: they can give you peace of mind, but the AAP says consumer heart-rate and oxygen monitors are not a way to prevent SIDS. They are not a replacement for a safe sleep space.
9. Real-life moments that trip parents up
Most parents know the basics. It is the in-between moments that catch us.
- Daycare, grandparents and sitters. Rules have changed a lot since many grandparents were raising babies. Share this guide with anyone who puts your baby down to sleep, and ask your daycare to walk you through their safe sleep policy.
- Travel and holidays. A travel crib or play yard with its own fitted sheet is safer than a hotel bed or a pile of pillows at grandma's house.
- The clocks change on November 1. Daylight saving time ends and baby's schedule may shift for a week. Overtired babies sleep more deeply, so keep the routine calm and the crib bare, even when nights feel a little chaotic.
- When you are exhausted. If you think you might fall asleep while feeding, it is safer to do it in an adult bed with pillows and blankets moved away than on a couch or armchair. Then move baby back to their own space as soon as you wake.
Your printable safe sleep checklist
| ☐ Baby goes down on their back, for naps and nights |
| ☐ Firm, flat mattress with only a fitted sheet |
| ☐ No pillows, blankets, bumpers or toys in the crib |
| ☐ Crib or bassinet in our room for the first 6 months |
| ☐ Room is comfortable, and baby passes the neck check |
| ☐ No hat, nothing covering the head or face |
| ☐ Sleep sack instead of a blanket, with no weights |
| ☐ Swaddle stops at the first sign of rolling |
| ☐ Car seat and swing naps are moved to the crib |
| ☐ Everyone who watches baby knows these rules |
Frequently asked questions
When is my baby past the highest risk for SIDS?
Most SIDS deaths happen before 6 months, with the highest risk between 1 and 4 months. But safe sleep habits are recommended for the whole first year.
Can my baby sleep with a blanket?
Not in the first year. Loose blankets can cover a baby's face. Use a wearable blanket (sleep sack) instead, matched to your room temperature.
Are sleep sacks safe for newborns?
Yes, as long as they fit well, have no weights and match the room temperature. The neck and armholes should be snug enough that baby cannot slip down inside.
Is it okay if my baby falls asleep in the car seat?
It happens to everyone. Car seats are safe for travel, but they are not made for routine sleep. Move your baby to a firm, flat crib or bassinet once you arrive.
Are crib bumpers safe if they are breathable mesh?
Padded bumpers and vinyl bumper guards were banned in 2022. Non-padded mesh liners were not included in the ban, but the AAP still recommends keeping the crib completely bare.
What temperature should the nursery be?
Many families find 68–72°F (20–22°C) comfortable. The best guide is your baby: warm and dry at the back of the neck is just right.
When should I stop swaddling?
As soon as your baby shows any sign of trying to roll, usually around 3–4 months. Switch to a sleep sack with the arms out.
Do baby monitors prevent SIDS?
No. The AAP says consumer heart-rate and oxygen monitors should not be used to reduce SIDS risk. A safe sleep space is what protects your baby.
Sleep safe, sleep soft
You do not need to get everything perfect. You need a few steady habits, repeated every night: back to sleep, a bare and flat crib, and a baby who is comfortable, not hot. Those habits have saved thousands of little lives, and they will keep protecting yours.
When you are ready for sleepwear that fits those habits, explore our bamboo sleep sacks, snug-fit zip rompers and footie rompers, all made from soft, breathable bamboo viscose. Sweet dreams, mama.
Sources: American Academy of Pediatrics, "Sleep-Related Infant Deaths: Updated 2022 Recommendations"; CDC, Data and Statistics for SUID and SIDS (2024 data); U.S. Consumer Product Safety Commission, Safe Sleep; Safe Sleep for Babies Act (Public Law 117-126). This article is for general information and does not replace advice from your pediatrician.
