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Therabell CradleUp Arms-Up Swaddle Sack
Therabell CradleUp Arms-Up Swaddle Sack
🤱 Keeps the snug, held feeling through the put-down
🤚 Catches the startle before it wakes her
🌙 Hands free to self-soothe · hip-healthy fit
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Therabell CradleUp Arms-Up Swaddle Sack
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Why Your Baby Wakes Up The Second You Put Her Down
It's not a bad habit. It's the startle reflex, and the snug, held feeling ending all at once. CradleUp is designed to handle both: it keeps your baby wrapped in soft, warm, contained pressure through the whole put-down, and holds her arms gently up in their natural position so the startle is caught before it finishes, while her hands stay free to reach her face and self-soothe.
Carry what you can. Catch what you can't.
Why It Works
- Catches the startle: the arms-up hold meets the Moro flail with gentle resistance, like a seatbelt in a sudden stop.
- Keeps the held feeling: snug, warm combed cotton carries the contained "still being held" feeling through the transfer.
- Works with her arms, not against them: arms up where she naturally wants them, so there's no wrestling match and no Houdini breakout.
- Hands free to self-soothe: she can get her hands to her face to settle herself back down.
- Two-way zip: quiet, no-unwrap diaper changes at 3am.
- Roomy, hip-healthy lower body: snug where it soothes, loose where her hips and legs need to move.
Details & Sizing
Soft pure-cotton fabric with a smooth two-way zipper. Best for newborns through the startle-reflex window; stop swaddling at the first signs of rolling.
| Size | Baby weight |
|---|---|
| S | Under 5 kg (up to ~11 lb) |
| M | 4–7.5 kg (~9–16 lb) |
| L | 6.5–10 kg (~14–22 lb) |
Length: 70 cm (~27.5"). Machine wash cold, tumble dry low.
Designed to help your baby stay asleep through the transfer. Results vary from baby to baby. This product is not intended to prevent or reduce the risk of SIDS.
“First time in months she napped in her bassinet instead of on me. I cried.”
Mara P.
“The transfer finally sticks. I put her down and she stays down.”
Steph C.
“We went from waking every 30 minutes to real naps. Lifesaver.”
Danielle R.
“My Houdini baby couldn't wriggle out of this one. Arms up, snug, asleep.”
Priya S.
“I can finally do the night shift. She settles the second I put her down.”
Marcus T.
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
Carry what you can. Catch what you can't.
Arms up, like the womb
The transfer that finally sticks
In your arms vs. in the CradleUp
The held feeling doesn't have to end the moment you put her down.
Why CradleUp, not another swaddle
Most swaddles fight your baby's body. CradleUp works with it.
| CRADLEUP | OTHER SWADDLES | |
|---|---|---|
Holds arms UP in the natural position |
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Catches the Moro startle reflex |
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Hands free to self-soothe |
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No-escape fit, no Houdini breakouts |
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Quiet two-way zip (no loud Velcro) |
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Hip-healthy, roomy lower body |
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Keeps snug warmth through the transfer |
Built for the put-down
We built CradleUp for the parent stuck on the couch
You've fed her, rocked her, waited for the deep sleep, and the second your hands leave her, her eyes fly open. That's not a bad habit, and it's not you. It's the startle reflex and the snug, held feeling ending all at once. CradleUp is designed to carry that feeling across the put-down and catch the startle in the natural arms-up position, so the transfer finally sticks.
How CradleUp works
Your baby isn't reacting to the crib. She's reacting to the sudden change between being held and being let go. In your arms there's constant pressure, your warmth, and the feeling of being contained. Put her down and all of it switches off at once, and the Moro startle reflex flings her arms out. You can't switch that reflex off; the part of her brain that would suppress it isn't built yet.
So CradleUp does two things at the put-down. It carries the snug, warm, held feeling across the handoff so her body never registers a change worth waking for, and it catches the startle in the natural arms-up position, meeting the arm-flail with gentle resistance like a seatbelt in a sudden stop, while her hands stay free to reach her face and self-soothe. Carry what you can. Catch what you can't.
Use through the startle-reflex window and stop swaddling at the first signs of rolling. Always place baby on her back to sleep. Designed to help the transfer stick; results vary, and it is not intended to prevent or reduce the risk of SIDS.
Questions parents ask
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I already tried swaddling and it didn't work.
You probably tried an arms-down wrap that pins her arms. CradleUp holds the arms up in the natural position she actually wants, so she works with it instead of fighting it. If your baby fought every other swaddle, that's the sign this one was built for her.
Won't she get dependent on it?
It's a temporary fourth-trimester tool. Use it through the startle-reflex window and stop at the first signs of rolling (usually around 3–4 months).
Is it safe?
Soft, breathable single-layer cotton, no loose blanket, and a roomy hip-healthy lower body so legs can fall into the natural frog-leg position. Always place baby on her back to sleep and stop swaddling at signs of rolling. CradleUp is not intended to prevent or reduce the risk of SIDS.
What if my baby's startle is really strong?
The snug fit and arms-up hold are designed exactly for the strong-startle baby. They meet the flail with gentle resistance instead of leaving the arms loose to wake her.
Which size do I choose?
S fits under 5 kg, M fits 4–7.5 kg, and L fits 6.5–10 kg. A snug fit is what makes it work, so size to your baby's current weight rather than sizing up.