You can put a blanket in your child’s crib after their first birthday. Before 12 months, loose blankets are one of the most dangerous items in a sleep space. The American Academy of Pediatrics recommends keeping all loose bedding, pillows, stuffed toys, and soft objects out of the crib for the entire first year of life.
Why Blankets Are Dangerous Before 12 Months
Babies under one year old lack the strength and coordination to push a blanket away from their face if it shifts over their nose and mouth during sleep. Unintentional suffocation is the leading cause of injury death among infants, and 82% of those deaths are attributed to accidental suffocation and strangulation in bed. Among sudden unexpected infant deaths classified as suffocation, soft bedding is responsible for 69% of cases. Blankets specifically are the most common airway obstruction, found in 34% of soft-bedding suffocation deaths.
These aren’t rare freak accidents. Infants sleep for 12 to 16 hours a day, and during that time they move unpredictably. A newborn who can’t yet roll over still has enough random movement to pull a loose blanket against their face. By the time they can roll (around 2 to 4 months), the risk compounds: a baby who rolls face-down into soft bedding may not have the neck strength or awareness to reposition.
Weighted Blankets Are Never Safe for Babies
Weighted blankets and weighted swaddles deserve a separate, firm warning. The CPSC, CDC, NIH, and AAP have all stated that weighted sleep products are not safe for infants, period. A baby’s rib cage is not rigid, so even modest pressure can compress the chest enough to interfere with breathing and heart function. There is also evidence that weighted products can lower oxygen levels, which may harm a developing infant’s brain. This applies to weighted sleep sacks and weighted swaddles too, not just traditional weighted blankets.
What to Use Instead During the First Year
For the first few months, a swaddle keeps your baby warm and snug. Once your baby starts showing signs of rolling over, typically between 2 and 4 months, you should stop swaddling immediately. A baby who rolls onto their stomach while swaddled cannot use their arms to reposition, which creates a suffocation risk.
At that point, switch to a sleep sack (also called a wearable blanket). Sleep sacks zip on like a little sleeping bag, keeping your baby warm without any loose fabric that could cover their face. They work well from the rolling stage all the way through toddlerhood, and many parents use them until age 2 or 3.
Beyond what your baby wears, room temperature matters. Aim for 68 to 72 degrees Fahrenheit in the nursery. Anything above 72°F may cause overheating, which is itself a risk factor for sleep-related infant deaths. Dress your baby in clothing appropriate for the room temperature, and skip the extra layers. A onesie or footed pajamas under a sleep sack is usually enough.
How to Introduce a Blanket After Age 1
Once your child passes their first birthday, a thin, lightweight blanket is generally considered safe. That said, there’s no rush. Many toddlers kick off blankets throughout the night and won’t reliably stay under one until age 3, 4, or even 5. A sleep sack remains a perfectly good option for as long as your child tolerates it.
If you want to start the transition, introduce the blanket during daytime first. Use it while cuddling on the couch or during a calm moment in a rocking chair so it becomes a familiar comfort object. Some parents begin this weeks or months before actually placing the blanket in the crib at night. When you do move it to the sleep space, start with naptime rather than overnight so you can observe how your child interacts with it.
Choosing the Right Blanket
Go with a thin, breathable material. Organic cotton and cotton muslin are popular choices because their loose weave allows airflow, reducing the chance of overheating or restricted breathing if the blanket ends up near your child’s face. Avoid thick quilts, fleece, or anything heavy.
Size matters too. A crib blanket typically measures 30 by 40 inches to 36 by 52 inches. Stick to a blanket sized for the crib rather than a larger toddler or adult blanket, which creates more excess fabric to bunch up. Tuck the blanket around the bottom of the mattress so there’s less material to shift upward during the night.
When to Add Pillows and Stuffed Animals
Pillows follow a slightly later timeline. The AAP recommends waiting until age 2 to give your child a pillow, and when you do, choose one that’s small and firm. Large, fluffy pillows pose the same suffocation risk as loose bedding for younger toddlers who may not reposition themselves reliably during sleep.
Stuffed animals fall into the same category as other soft objects: keep them out of the crib for the first year. After 12 months, a single small stuffed animal is generally considered low risk, but avoid filling the crib with multiple plush toys or large ones that could cover your child’s face.