Wondering when to stop using Zippies for bedtime? You’re not alone! One of the most common questions caregivers face is how and when to make the baby pajama transition — especially when it comes to swapping cozy Zippies for Two-Piece Pajama Sets. If you're currently navigating the toddler pajama transition or simply curious about what to expect, we’ve got answers (and adorable options) for every stage.
In this guide, we’ll walk you through the baby sleepwear milestones, share helpful tips, and explain how Little Sleepies makes the transition from Zippies to Two-Piece Pajama Sets feel like a dream.
What’s the Difference Between Zippies and Two-Piece Pajama Sets?
Before we dive into when to switch, let’s talk about one-piece vs two-piece pajamas.
Zippies are our one-piece pajamas that include thoughtful features like fold-over mittens and convertible foot cuffs (unlike regular footie pajamas), a double zipper for quick and easy changing, and a snug fit for safe sleep.
Two-Piece Pajama Sets include a separate top and bottom, making them perfect for independent toddlers, potty training, and littles who love to dress themselves. They also include a snug fit for safe sleep.
Both are designed with comfort and safety in mind. The difference lies in how your child moves, grows, and feels in each style.
When Do Babies Stop Wearing Footie Pajamas?
There’s no set age for when you should stop using Zippies for sleep, but many families make the switch sometime between 12 and 24 months. That being said, every baby is different and their cues will tell you more than the calendar can.
Look for these signs it might be time to size up or switch:
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The fold-over foot cuffs can no longer convert to footie pajamas
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Your little one is walking confidently or showing increased mobility
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They’re starting to potty train or showing interest in the potty
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They’re climbing in and out of the crib
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They’re tugging at or resisting one-piece pajamas
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Their current sleepwear feels too snug, even after a recent size-up
LS Tip: Our pajama size guide can help you determine if it’s time to size up or explore new pajama styles.
Why Some Caregivers Stick with Zippies
If your baby is still happily snoozing in a Zippy, that’s okay, too! Many families continue using one-piece sleepwear well into toddlerhood, especially during colder months or overnight diaper changes.
Reasons to stay with Zippies:
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You’re doing frequent diaper changes
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Your baby still fits comfortably in their current size
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You prefer full-body coverage for cooler nights
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You’re looking for simplicity during travel or routines
How Little Sleepies Supports a Smooth Baby Pajama Transition
We designed our sleepwear to grow with your child. So whether you’re team Zippy or ready for Two-Piece PJs, our pajamas feature:
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Lunaluxe® Bamboo viscose for breathable, temperature-regulating comfort
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Snug, safe fits that meet CPSC safety standards
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Tagless designs that are gentle on sensitive skin
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Stretchy fabric that allows for movement and longer wear
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Adorable prints that match across styles and sizes (hello, sibling matching!)
Safety First: What to Look For in Baby and Toddler Pajamas
As your little one grows, safety remains top of mind. Here are a few key features to keep an eye out for during the baby pajama transition:
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A snug fit to meet flame resistance guidelines
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Breathable fabric to help regulate body temperature
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Double zippers that make diaper changes quick and easy
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Soft seams and no tags for maximum comfort
At Little Sleepies, we’re proud that every pair of pajamas is made with safety and comfort at the heart of it all.
How to Ease Into Two-Piece Pajamas
The best way to tackle this toddler pajama transition is to make it fun and familiar! Here are some easy tips for a smoother switch:
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Try two-piece PJs during naptime first before committing at bedtime (here are some tips & tricks for managing nap schedules!)
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Let your toddler help pick the print! they’re more likely to love what they helped choose
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Stick to your usual bedtime routine for consistency
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Choose stretchy, ultra-soft sets that feel as cozy as their Zippy
“Love Little Sleepies for my littles!! First set “two-piece” for my 1 year old! Perfect transition from zippies!” ~ Paige T.
Can You Use Both Pajama Styles?
Absolutely. In fact, many families find it helpful to keep both styles on hand, depending on the season, routine, or even the day's mood.
Here’s how some of our LS fam mixes it up:
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Zippies for cooler nights or travel
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Two-Piece Sets for potty training or warmer weather
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Matching prints for siblings at different stages
“First transition from Zippy to Two-Piece [and] these are so cute, soft, and comfy-my 1 year old loves them!!” ~ Ashley F.
Baby Pajama Transition FAQ
What’s the best age for two-piece pajamas?
Most toddlers are ready between 12–24 months, but follow your child’s developmental cues. If they’re pulling at zippers, climbing into bed, or showing potty interest, they might be ready.
Can I go back to Zippies after trying two-piece sets?
Of course! Every day is different. Some toddlers prefer one style over the other depending on how they feel, what they’re doing, or the season.
Do I need to size up when switching to two-piece sets?
Check our size chart for guidance. Our fabric is designed to stretch and grow with your little one, but sizing needs may vary as they become more mobile.
Trust Your Baby's Cues (And Your Instincts)
At the end of the day, the best baby sleep clothing guide is your own child. Whether you’re transitioning from Zippies, testing out a two-piece set, or using both, Little Sleepies is here to help you make the transition with confidence.
