When to Stop Using a Sleep Sack for Baby

As a parent, few things in life are sweeter than watching your little one sleep peacefully in their cozy sleep sack . Like all precious moments in your baby’s journey, the sleep-sack phase eventually ends.

If you're wondering when to stop using a sleep sack, also known as a sleep bag, you're not alone. As your baby grows and becomes more active, it's natural to consider shifting to a different sleep environment.

Luckily, we’re here to guide you through this night-time transition.

When do you stop using sleep sacks? Well, adjusting your little one from sleep sacks to a new sleeping arrangement isn’t a one-size-fits-all process. Typically, your baby will signal when they’re ready for this change through two main indicators:

• Their physical development

• Their age and size

Let’s explore these signs together so you can decide what’s best for your little one.

The moment when your baby first rolls over is equally thrilling and nerve-wracking, and mobility milestones like these are important in determining when to move on from baby sleep bags.

Here are some clear signs to watch for:

• Your baby often rolls from back to tummy and vice versa

• Your baby attempts to sit or stand up in the crib

• Your baby tries to crawl while wearing the sleep sack

Additionally, if your little one is already walking, the sleep sack may be too restrictive for them.

While some baby sleep sacks are designed to accommodate rolling and other early movement, you’ll know it’s time to transition when your infant seems frustrated by their restricted movement. Just like you wouldn’t want to do morning yoga in a sleeping bag, your little one needs space to stretch, wiggle, and perfect their emerging motor skills.

There are no strict age guidelines for making this transition. For approximately the first few months of your infant’s life, you may want your newborn to sleep swaddled to help them feel comfortable and secure.¹ The American Academy of Pediatrics further recommends staying away from loose blankets until your baby is at least 12 months old.²

Then, once your child starts moving their arms more, a baby sleep sack can offer the warmth of a swaddle while still allowing them to move when in their crib.

Around 18 months to two years, your little one has likely outgrown the days when they seemed to swim in even the smallest sleep bag. If you’re wondering whether those toes are feeling too cramped, consider the following factors:

• Most sleep sacks are rated for use until 18-24 months.

• Once your child reaches the maximum weight limit for their sleep sack (usually 30-35 pounds), it’s time to transition to a better sleep environment.

• If your toddler is tall for their age and the sleep sack is becoming snug, this could be your cue to switch.

Like transitioning from a bassinet to crib, any change in sleep routine can feel daunting, so it's important to find the right replacement to make your little one feel warm and secure at bedtime.

You may recall how challenging it was to establish a new morning routine or adjust nap schedules for your baby. The same gentle, gradual approach applies when transitioning away from sleep sacks. Taking your time with this change can help your toddler feel secure and comfortable, ensuring better sleep at bedtime.

To make this transition as smooth as possible, consider the following sleep training tips:

• Starting with nap time – Test out new sleepwear during daytime naps first, when the pressure to sleep is lower and you can easily monitor your child.

• Choosing the right season – If possible, make the switch during warmer months when your little one won’t miss the extra warmth.

• Considering a transitional item – A special stuffed animal or lovey can provide comfort during this change.

Even though this is a massive change for you, it may feel even more significant to your little one. Be patient and remember that some children adapt more quickly to big changes than others. You know your child best, so trust your instincts and follow their cues!

Some toddlers may be apprehensive about the new sleeping arrangement, but once they get used to it, they will love the freedom to stretch, roll, and find the perfect sleeping position on their own terms. With careful patience and the right sleepytime accessories, you can create a comforting and safe sleep environment that eases this transition.

At Posh Peanut, we’re here to make this next chapter as cozy as the last. From our buttery-soft baby pajamas to our Patoo^® reversible blankets , every item is crafted with love for your growing dreamer.

Explore Posh Peanut’s curated collection of toddler sleepwear and bedding today.

Sources: 

¹ Taking Cara Babies. Sleep Sacks.

https://takingcarababies.com/sleep-sacks?srsltid=AfmBOopm2PLTi_Uho8u_XlTAnMJhRZtNVPw_OHCegbrySyvnZj-kLh_-

² American Academy of Pediatrics. SUID and Safe Sleep Overview.

https://www.aap.org/en/patient-care/safe-sleep/