The Zen Sack™ is a safer option to loose blankets. Its Cuddle Pad mimics the
gentle feel of your hand to help baby sleep soundly, with fabric options for each season.
Grows with your baby
4 TOG options for any temperature
Improves sleep in a few nights*
Nested Bean
ZKKC200100-S
45021439361209
On Sale
Christal H.
This is my third sac! .. my baby sleeps so well! We forgot it once on our trip and never made that mistake again!
Before getting this sleep sack baby girl really struggled when being put in her bassinet. (Now) she is no longer restless at night and sleeps much longer.
The Zen Sack™ is a safer option to loose blankets. Its Cuddle Pad mimics
the gentle feel of your hand to help baby sleep soundly, with fabric options for each season.
Grows with your baby
4 TOG options for any temperature
Improves sleep in a few nights*
Mimics your touch to help baby self-soothe and sleep sounder
Adjustable shoulder snaps for a custom fit as baby grows
Side zipper makes changing easy without waking baby
Two-way zipper makes diaper changing easy without undressing
Gently eases transition from swaddling
Designed for babies from 0 to 24 months
All are machine washable (cold cycle) and dryer safe (low heat)
Premier (0.3 TOG): Bamboo blend — ultra-light for warmer climates
Quilted (1.0 TOG): Soft cotton with lightly quilted fill — for cooler weather
Winter (2.5 TOG): Soft cotton and ultra plush poly-fill — ideal for colder nurseries
Lightly padded to mimic the warmth of your touch
Applies gentle pressure no more than a human palm or car-seat chest clip
Passes mandatory children's product tests
Designed for tummy sleepers when rolling independently
Hip healthy. Does not hinder mobility
Will it really improve my baby’s sleep? Many of our parents report they and their little ones improved
their sleep within 1 to 3 nights. Longer stretches and fewer wakeups.
How is it different from regular swaddles or sleep sacks? The Zen Sack is the only sleep sack with a
patented Cuddle Pad™ that mimics your gentle touch. It’s designed to make sleep feel familiar and comforting
especially for babies transitioning out of the swaddle.
Can my baby wear this if they roll? Never place a baby to sleep on their stomach when they cannot roll
independently. For babies who have passed the milestone, the Zen Sack is designed for both back and tummy
sleepers. The Cuddle Pad™ is safe for rolling babies and can be worn on the front or back.
Could it cause overheating? Each Zen Sack is available in a range of TOG levels for different seasons and
room temperatures, so you can pick the right one for your baby’s needs to maintain optimal body temperature.
(See our TOG guide for help.)
The Zen Weighted Sleep Sack is machine washable, made from 100% breathable cotton, and designed to self-soothe newborns by helping with sound sleep. The Nested Bean Weighted Sleep Sack Classic is a gently weighted breathable baby sleep sack that calms by providing comforting pressure where babies are naturally held.
This secure feeling eases the swaddle transition, encouraging self-soothing and helping babies sleep through disruptions, leading to deeper periods of sleep that are essential for healthy development. This premium newborn sleepwear provides the perfect transition from swaddling to independent sleep.
Safer than loose blankets in your baby's crib, this weighted sleep sack is perfect for babies up to 24 months.
Unlike traditional newborn clothes, this specialized sleepwear for newborn babies is designed specifically for safe overnight sleep.
Made with 100% bamboo cotton fabric
Incredibly soft and breathable but cozy enough to keep baby warm, the Zen Sleep Sack Classic wearable blanket has a TOG rating of 0.5 for year-round comfort. This newborn sleepwear maintains the perfect temperature for comfortable sleep.
Sizes Available: Small (0-6M) newborn sleep sack; Medium (6-15M); Large (15-24M). See product images to learn more.
Perfect for tummy sleepers
The Zen Sack Weighted Sleep Sack wearable blanket is reversible and can be worn backward - perfect for babies who roll independently. This sleepwear for newborn adapts to all sleep positions.
Safely calms with only a few ounces
Designed in line with research from human factors safety experts and pediatric pulmonologists, this weighted sleep sack is safely weighted only where babies need it, not where they don't. The Nested Bean Weighted Sleep Sack has been rigorously tested and is scientifically backed by a recent university-led weight safety study.
Special features
Unlike a standard baby sleep sack or traditional newborn onesie, the Zen Sleep Sack features gently weighted Cuddle Pad™ technology that soothes like your touch. Adjustable snaps grow with your baby, and a top-quality 2-way zipper ensures easy changes.
Trusted by over 2 million families
92% of parents reported sleep improvements when using this Zen Sack™ Weighted Sleep Sack.*
*As per consumer research conducted from 2020–2023 involving parents who use Zen Sleepwear products for their infants.
We love the nested beans - they have worked well for both of our girls!
Jillian A.
Helpful customer service and an excellent product
Samantha E.
We love Nested Bean! I swear by them! We used them for our first and now our second. Helps with longer stretches and keeps baby comfy and warm all while being safe.
Rosa H.
Great quality super easy to use
Caitin K.
We love the nested beans - they have worked well for both of our girls!
Jillian A.
Helpful customer service and an excellent product
Samantha E.
We love Nested Bean! I swear by them! We used them for our first and now our second. Helps with longer stretches and keeps baby comfy and warm all while being safe.
Queries Related to Zen Sack™ Classic | Wearable Newborn Sleep Sack
All Zen sleep sacks feature a built-in Cuddle Pad™, which weighs just 30 grams (Small size) 60 grams (Medium size) and 90 grams (Large size and distributed across the chest). Our baby sleep sacks are safely weighted in key areas as opposed to all-weighted sleep sacks or weighted blankets, which the AAP has deemed unsafe for infants.
Nested Bean offers a variety of Zen Sack® Weighted Sleep Sack options, each crafted to comfort like your touch while meeting your baby's sleep needs across seasons.
The difference between our weighted sleep sacks is the fabric used for construction.
Zen Sack® Classic is a year-round weighted sleep sack made from 100% breathable cotton.
Zen Sack® Premier combines 70% rayon from bamboo for softness and 30% cotton for strength, making it a lightweight baby sleep sack, perfect for warmer climates.
Zen Sack® Winter is our warmest Nested Bean weighted sleep sack, with a 2.5 TOG and plush poly-fiber filling, perfect for colder nights.
And, Zen Sack® Quilted is a transitional Zen Sack™ weighted sleep sack ideal for fall-like temperatures.
Absolutely. Every Nested Bean weighted sleep sack is designed for safe use once babies start rolling. With flexible Cuddle Pads™ that flatten as baby moves, these newborn sleep sack alternatives support tummy, side, and back sleepers. For tummy sleepers, the Zen Sack™ weighted sleep sack can even be worn backwards for added comfort.
The Cuddle Effect™ is the calming, feel-good response babies experience when gently held. Our Zen sleep sack collection is built around this science. Thanks to our lightly weighted Cuddle Pads™, each weighted sleep sack mimics your soothing touch, helping babies relax, sleep deeper, and develop better.
Yes! Every Zen Sack™ weighted sleep sack meets or exceeds Consumer Product Safety Commission (CPSC) standards, including flammability and construction. Our Cuddle Pads™ are breathable, securely stitched, and designed to never restrict movement, making them a safe baby sleep sack choice for all sleep positions. This newborn sleepwear is rigorously tested for safety.
When your baby begins rolling, it’s time to transition from swaddling to a Nested Bean weighted sleep sack. The Zen Sack™ makes this transition smoother with its calming, lightly weighted design, offering your little one uninterrupted, longer sleep.
While each baby is different, most parents see improved sleep in just 1–3 nights after switching to a Zen sleep sack. The comforting weight and cozy fit work quickly to help babies self-soothe and stay asleep longer. This newborn sleepwear delivers faster results than traditional sleep aids.
Each Nested Bean weighted sleep sack includes adjustable shoulder snaps, allowing your Zen sleep sack to grow with your baby. This feature ensures a snug fit early on, with room to expand as your little one grows. This sleepwear for newborn design maximizes value and usability.
Yes! Every Nested Bean weighted sleep sack is crafted from high-quality, machine-washable fabrics. For best results, wash cold on a gentle cycle and tumble dry on low, keeping your baby sleep sack soft, safe, and long-lasting. Proper care maintains the quality of this premium newborn sleepwear.
Zen Sack™, the only weighted sleep sack you’ll ever need
Seamlessly transition from swaddling
When rolling starts, swaddling stops—and some babies miss their cozy swaddle. Prevent wakeups with the gently weighted Zen Sack: So soothing, but tummy sleeper safe.
Stop sleep regressions
Rolling, sitting up, teething: New milestones can mean sleep regressions. Add the gently weighted Zen Sack to your sleep routine to help create positive associations with bedtime.
Help baby sleep through the night
Nighttime wakeups? The gently weighted Zen Sack is so comforting, it helps babies self-soothe—so they fall back to sleep on their own.
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