Sleep sacks are an invaluable addition to many parents’ bedtime routines. These cozy, wearable blankets help babies stay warm and snuggled all night without the need for loose blankets, which can be unsafe for infants. Newborns or infants should use a swaddle until they show signs of rolling. If your baby shows signs of rolling, it is time to transition to a sleep sack. You may feel a sense of nostalgia towards these blankets. In some cases, they provided a sense of comfort and security for you too (knowing you would get sleep overnight)! So the question is…when should your child stop using a sleep sack?

The American Academy of Pediatrics recommends the use of a sleep sack. Many parents love using sleep sacks because they create a safe sleep environment that reduces the risk of sudden infant death syndrome (SIDS). However, as your child grows, there comes a time when a sleep sack is no longer the best choice. Knowing when to stop using a sleep sack is essential for your baby’s comfort and safety. Here are some key signs to look for that will help you decide when your baby is ready to transition from a sleep sack to regular bedding.

When To Stop Using A Sleep Sack

When To Stop Using A Sleep Sack

1. Outgrowing the Size:

Most sleep sacks come in various sizes. Different sleep sacks are designed for specific age groups or weights. If your baby seems snug or cramped in their sleep sack, or if their feet start to touch the bottom, they may have outgrown it. Over time, it’s essential that babies have enough room to stretch and move their legs. When a sleep sack no longer fits properly, it could restrict your child’s movement. Restriction of movement may impact their ability to get comfortable and increase the chance they’ll wake up during the night.

2. Ready for a Blanket or Other Loose Bedding:

After 12 months of age, many parents feel comfortable transitioning to a blanket, particularly if their baby is already showing an interest in blankets. The American Academy of Pediatrics (AAP) suggests that once babies are old enough and emotionally ready, introducing a light blanket can be a great step forward. At this stage, introducing loose bedding can support their development, as they’re often excited for more independence in their sleep environment.

3. Emotional Readiness:

Some babies may become uncomfortable with the sensation of a sleep sack. They may show interest in sleeping like adults do with a blanket. When your baby seems to resist wearing their sleep sack or starts to pull it off, it could be a sign they’re emotionally ready for a new sleep arrangement. This readiness often aligns with a growing awareness of their surroundings and their desire for a bit more independence.

How To Transition From Sleep Sack To Blanket

How To Transition From Sleep Sack To Blanket

Once you notice the signs that it’s time to stop using a sleep sack, it’s time to consider how best to make the switch. Transitioning from a sleep sack to a blanket should be done gradually. A gradual approach will help your child feel comfortable and secure.

1. Start With Naps:

Begin the transition process by introducing a blanket during nap times instead of overnight. This shorter period gives your baby the chance to experience sleeping without a sleep sack and get used to the feel of a blanket. Over time, this can help your baby adjust without too much disruption to their nighttime routine.

2. Introduce Blankets While Using Sleep Sacks:

When it is the time to transition, consider introducing a small, light blanket while your baby is still using a sleep sack. Lay the blanket over their lower body. This position allows them to experience the sensation without feeling restricted or without depending entirely on the blanket for warmth. This technique can help familiarize your child with the idea of a blanket as part of their sleep routine. One of our favorite blanket brands is Woolino. Woolino’s toddler blankets are durable, hypoallergenic, and incredibly soft.

3. Choose a Baby-Friendly Blanket:

Opt for a lightweight, breathable blanket that’s the right size for your baby. Overly large or heavy blankets can pose a suffocation risk. A well-sized blanket gives your baby freedom of movement and reduces the risk of entanglement. 

4. Reinforce a Familiar Bedtime Routine:

Maintaining a consistent bedtime routine can be reassuring for your child. Introducing new sleepwear or bedding might make your baby a bit worried initially. Keeping the rest of the routine stable can help ease the transition. You might also consider letting them pick out a special blanket. Giving them a choice will make them more inclined to use it as they develop their sense of independence and readiness.

When To Stop Using A Sleep Sack

Additional Tips

Every baby is different. While some are ready to make the transition at 12 months, others might need a bit longer. Trust your instincts. Observe your baby’s comfort level, readiness, and developmental signs. With the gradual transition process, most children adapt well to sleeping with a blanket. It provides them both warmth and a touch of independence.

Using a sleep sack is a safe and practical way to help babies sleep soundly and securely in their early months. However, when you start noticing your baby’s changing sleep needs, it’s worth considering this transition. For additional guidance on sleepwear choices, consider reading about the differences in “Sleep Sack vs Swaddle” for more insights. For a comprehensive list of top-rated options, you can explore some of the best baby sleep products to find what best suits your baby’s sleep environment.

Sleep Shore Sleep Consulting

Is your little one having difficulty self-soothing for naps? If your child is unable to fall asleep, stay asleep, or wake up at a normal time, it may be time to consider sleep training. Sleep Shore offers personalized solutions for each unique sleeping situation to get your little one on track- whether they’re a newborn, infant, or toddler. We also offer in home sleep training services in the Boston, Massachusetts and Michigan area. Sleep training offers babies and children with the skills to fall asleep on their own so they can wake up feeling more well-rested- and in turn, you’ll feel more energized, too! See what this mama had to say about our sleep services below: 


“Working with Molly was a game changer for our family! My 4 month old was contact sleeping for everything — night and all naps. My husband was sleeping in the guest room. I had no life. I had to plan out when I would shower before going to bed at 7:30pm with my baby. It was not sustainable for myself or my baby boy. I could tell he wasn’t getting the sleep he needed. Within 2 days of working with Molly, baby boy was falling asleep independently in his crib and staying asleep. Within a week, we were having to wake him up from every single nap. My husband tells other father friends that it was the best money we’ve spent — he now has his wife and bed back! And, I’m enjoying all the awake time with baby boy and no longer worrying about when I’ll shower! – Mom of 4 Month Old