If you've landed here, you're probably a tired parent searching for a real solution — not another vague sleep tip. Weighted sleep sacks have become one of the most talked-about baby sleep products in Europe, and for good reason. In this guide, we cover everything you need to know: how they work, whether they're safe, what to look for, and how Babydeepsleep® weighted sleep sacks differ from other options on the market.
What Is a Weighted Sleep Sack?
A weighted sleep sack (also called a weighted sleep bag or weighted sleeping bag) is a wearable blanket for babies and toddlers that contains evenly distributed weight — typically between 500g and 2kg depending on age and size. Unlike a standard sleep sack, the added weight applies gentle, uniform pressure across your baby's body, mimicking the sensation of being held.
This principle is called Deep Pressure Stimulation (DPS) — the same science behind weighted blankets used for adults with anxiety or sensory sensitivities. For babies, it activates the parasympathetic nervous system, signalling that it's safe to settle and sleep.
How Do Weighted Sleep Sacks Work?
The mechanism is simple but powerful. When your baby is placed in a weighted sleep sack:
- The gentle pressure triggers the release of serotonin and melatonin — the body's natural sleep hormones.
- The proprioceptive input (body-position awareness) calms the nervous system.
- The sensation closely mimics being held, which reduces the startle reflex that wakes many babies in the night.
The result: babies fall asleep faster, wake less frequently, and spend longer in restorative deep sleep — which means more sleep for you too.
Parents consistently report that within the first week of use, their babies settle more easily at bedtime and experience fewer night wakings. Our 17,758+ reviews reflect this pattern across families with colic, sleep regressions, and high-need babies.
Are Weighted Sleep Sacks Safe?
This is the most important question — and it's where European parents have a clear advantage over those in the US.
The EU Standard: EN 16781:2018
All Babydeepsleep® weighted sleep sacks are certified to EN 16781:2018 — the European standard specifically developed for weighted blankets and sleep products for children. This certification sets strict limits on:
- Maximum weight relative to child body weight (never more than 10%)
- Weight distribution — must be even, never concentrated in one area
- Material safety and breathability
- Age and size suitability thresholds
Our products are also OEKO-TEX® Standard 100 certified, meaning every component — fabric, filling, zips, and stitching — has been tested for harmful substances.
What About the US Controversy?
You may have seen news about weighted baby products being pulled from US retailers. In 2024, Amazon, Target, and Walmart removed several weighted infant products following concerns raised by the American Academy of Pediatrics (AAP). It's important to understand why this happened — and why it doesn't apply to our products.
The US products in question were not certified to any enforceable standard for children's weighted products. The EU EN 16781:2018 standard that Babydeepsleep® is certified to does not exist in the US — it was developed by European safety authorities specifically to address this gap.
If you're buying a weighted sleep sack, always check for EN 16781:2018 certification. If it doesn't have it, don't buy it.
Who Benefits Most?
Babies with Colic
Colic affects around 20% of infants. Deep pressure stimulation has a documented calming effect on the nervous system, and many parents of colicky babies report dramatic improvements in settling time and total sleep duration within the first two weeks of using a weighted sleep sack.
Sleep Regression
Sleep regression — the sudden return to frequent night waking — occurs at predictable stages: 4 months, 8 months, 12 months, 18 months, and 2 years. The weighted sleep sack provides consistent sensory grounding that helps babies re-settle between sleep cycles rather than fully waking.
High-Need and Sensitive Babies
Some babies simply need more sensory input to feel secure. A weighted sleep sack gives them the constant, reassuring pressure they need — without you having to be present all night.
Toddlers Transitioning from Co-Sleeping
The weighted sleep sack provides the closest sensory substitute to sleeping next to a parent, making the transition smoother for both of you.
How to Choose the Right Weighted Sleep Sack
By Age
- 0–6 months: Lightweight weighted swaddle, designed for the startle reflex phase
- 6–18 months: Standard weighted sleep sack with arm freedom for rolling babies
- 18 months – 4 years: Toddler weighted sleep sack with wider body for active sleepers
Fabric and TOG Rating
All Babydeepsleep® products use breathable, OEKO-TEX® 100 certified fabrics. The TOG rating on each product tells you exactly how warm it is — match it to your bedroom temperature.
Babydeepsleep®: Built in Europe, Certified for Europe
Founded in Helsinki, Finland, by parents who experienced first-hand how colic and poor sleep can push families to their limit.
- ✓ EN 16781:2018 certified
- ✓ OEKO-TEX® Standard 100 certified
- ✓ 17,758+ verified parent reviews, 4.5/5 average
- ✓ Registered trademark
Shop Babydeepsleep® Weighted Sleep Sacks →
Frequently Asked Questions
What age can babies use a weighted sleep sack?
From birth with the appropriate newborn swaddle. For the standard weighted sleep sack, from 6 months when babies can freely roll.
How heavy should a weighted sleep sack be?
Under EN 16781:2018, the weight must not exceed 10% of the child's body weight. Our products are calibrated within this limit for each age range.
Is a weighted sleep sack the same as a weighted blanket?
No. A weighted blanket is a loose blanket — unsuitable for babies. A weighted sleep sack is a certified wearable garment. Never use a loose weighted blanket for a baby under 18–24 months.
Can a weighted sleep sack help with sleep regression?
Yes. Many parents report that their babies resettle more easily between sleep cycles during regression phases.
Are weighted sleep sacks banned in the UK or EU?
No. Certified products (EN 16781:2018) are fully legal across the UK and EU. The controversy relates to uncertified products without safety standards.
Let customers speak for us
Our son woke Up very often in the middle of the night and struggled to calm down. The weighted back helps him to sleep through the night and we ordered a second one.
I'm a big fan of sleepsacks, both with and without weight. The swaddle is clearly well thought out. It's very intuitive how the arms should be placed. The weight has a smart shape and filling. It even has small holes along the sides to ensure your baby doesn't get overheated. The material is nice quality and the zipper seems like it will live out the lifetime of the product. Love it.
Wir sind super zufrieden. Meine Tochter(9monate) konnte nie auf dem Rücken schlafen weil sie immer durch ihre eigenen Bewegungen wach wurde. Seit dem ersten Tag der Nutzung kann sie jetzt auf dem Rücken schlafen, schläft viel schneller ein und wacht nicht mehr so oft in der Nacht auf wie davor. Ich fände es super wenn der Ausschnitt am Nacken tiefer wäre dann könnte man den schlafsack auch "falschrum" anziehen und das Gewicht auf dem Rücken haben sodass das Baby auch auf dem Bauch schlafen kann aber sonst top!!!
Wir haben den Schlafsack mit und ohne Beine und jetzt zuletzt auch die Weste gekauft.
Den Schlafsack haben wir gekauft, weil unser Baby damals immer schon um fünf Uhr morgens wach wurde, und nicht mehr weiter schlafen wollte. Nachdem sie mit dem Schlafsack geschlafen hatte, hat sie bis sieben Uhr morgens geschlafen und das einmal nachts Stillen hat sie auch aufgegeben und durchgeschlafen!!!
Seit her verwenden wir die Schlafsäcke vor allem wegen des frühen Aufwachens! Wir haben Phasen wo wir ihn nicht brauchen und Phasen, wo sie wieder damit schläft!
Einfach Top diese Schlafsäcke!
Für den Sommer schön dünn vom Stoff!
Im Winter haben wir in den Babyzeiten einen Wintersack drüber gezogen!
Und jetzt schläft sie einfach mit Decke drüber.
Vielen Dank für diese tollen Produkte.
Wir nennen unseren Schlafsack Schildkröte, weil es aussieht, als hätte sie einen Krötenpanzer an.
Ausprobieren und lieben!!!
Made it possible to put the baby down in the baby nest! Before baby could just sleep on me.
We had extreme problems with our 3rd child's sleep. After 3 months, we were at our wit's end and tried just about everything. He never slept for more than 45 minutes at a time and not by himself. It improved with the weighted sleeping swaddle. Now he is 5 months old and sleeps well for several hours.
Our daughter is 17 months old and she has a regular wake-up schedule around 9 PM, 11 PM, 2 AM, 4 AM, and 5:30 AM, usually staying awake between 5:30 AM and 6:30 AM.
She frequently wakes up during the night, feeling upset, tossing and turning, and wanting to breastfeed. She gets upset if she doesn't get to breastfeed and prefers to sleep on us while we have to stand up and rock her back to sleep. She usually sleeps in my bed.
Nights have been challenging, and we were getting desperate. However, last night was our first experience with the weighted sleeping bag... 😱 😱
She woke up around 12 AM for the first time, climbed on me, and quickly fell back asleep. She woke up a few times after that but managed to soothe herself back to sleep. At 5 AM, I had to stand up and rock her, but she quickly fell back asleep. At 6:10 AM, there was a joyful wake-up call from our 1.5-year-old. She slept much more soundly and peacefully, and she managed to fall back asleep on her own, which she had never done before.
We noticed a significant improvement just on the first night. In fact, I don't feel utterly exhausted this morning and don't have that pressing need to take a nap during the day, which I usually do. I'm feeling enthusiastic about the upcoming nights and hoping to get a full night's sleep without interruptions, so I can regain some normalcy in my life. I can't imagine what we would have done if we hadn't found this weighted sleeping bag.
I just want to say... thank you!! ❤
About 4 months ago, we entered a nightmare period. Our little boy, who had been sleeping through the night and was generally happy, suddenly started waking up multiple times during the night, inconsolable. Initially, we attributed it to a cold, but even after he recovered, the night disturbances continued. About 2 months later, he was diagnosed with asthma, which seemed like a valid reason for his nighttime awakenings. However, despite responding well to asthma medication and having no issues during the daytime, the nights remained a pure ordeal. He would wake up incredibly anxious and screaming, and we often found ourselves staying up for hours trying to soothe him back to sleep. We tried everything and came across something called 'Night Terrors,' which seemed to describe his symptoms perfectly – an anxious nightmare from which he couldn't wake up, likely triggered by his illness.
I am a trained occupational therapist, and I understand the importance of sensory stimuli for many individuals. So, we began researching products related to weighted blankets/bags. That's when we discovered this sleeping bag.
We received it a week ago, and now, he puts it on when he has his nighttime bottle, creating a positive association. And I must say, it's been a tremendous success. He has slept for a full 11 hours every night for the past 7 nights. Our boy is now extremely happy and well-rested, and so are his parents
Our son used to wake up in the middle of the night and struggle to fall back asleep, sometimes staying awake for 2-3 hours. When we read a lot about weighted pajamas, we decided to give them a try. We noticed results almost immediately. He started falling asleep faster and sleeping more peacefully. Instead of having 2-4 wakeful nights a week, it reduced to just one. Now that he has moved in with his big sister, he sleeps through the entire night, and we still use the weighted pajamas because we're afraid to try without them.
We purchased the Baby Deepsleep for our son a couple of months ago. It worked very well in terms of his daytime naps, but it was challenging to determine if it helped at night since our son continued to wake up as frequently as before. Nevertheless, it's a nice product, and I can certainly recommend it to everyone I know to give it a try
When my daughter turned 4 months old, her sleep gradually started to deteriorate. By the time she was 7-8 months old, it had become so bad that going to bed seemed pointless. She would wake up crying 1-2 times every hour throughout the night, and sometimes even more frequently during the early hours of the night. It was absolute torture.
I was aware of weighted swaddle but had hesitated due to the price. However, after trying everything else without success, it was our last option. We've used it for the past 4 nights, and the results have been remarkable. For the first 2 nights, she slept for 7-8 hours straight, and for the last 2 nights, she slept for a whopping 10 hours (!!) before waking up for a bottle. It's been incredible, and it has truly been my salvation. I should have bought it several months ago. I can't recommend a weighted bag enough!
Our girl had colic for the first 2 months, and all her sleep was on us parents... 🤯 We couldn't get her to sleep on her own under any circumstances. The first few nights with the weighted swaddle were a bit challenging as it didn't wrap as tightly as she was used to. But then, something miraculous happened! We woke up one morning and were utterly amazed because she had slept for 11 hours straight. Initially, we thought it might be a one-time occurrence, but to our delight, she has been doing the same thing every night since! 🤩 It's been a month now, and we use the weighted swaddle every time she needs to sleep, whether it's in the sling, the stroller, or the crib. We're even considering getting an extra one because we can't do without it when it's being washed. 😅🙈 The weighted swaddle has truly been invaluable to us, and we wholeheartedly recommend it!
Highly recommended if you have a child who refuses to sleep. My daughter, who was then 5 months old, simply wouldn't sleep. But once she got the weighted sleeping swaddle, she started sleeping right away. I could even stop using the stroller, and she would continue sleeping.
She went from only sleeping for 20 minutes while being held to using the weighted sleeping swaddle, and on the first day, she slept for 40 minutes in her stroller. The naps only got longer from there. Now, she's a happy and well-rested child! 🤩😍
We purchased a weighted bag for our 13-month-old daughter, who hasn't had significant sleep issues. She used to wake up 3 times at night for breastfeeding. After using the weighted bag for 14 days, we've seen a noticeable improvement. She has at least halved the number of awakenings where she needs assistance to fall back asleep 🤪.
We also immediately noticed a slower respiratory rate, with deeper breaths.
We're very pleased with the customer service and the fast delivery to Norway.
Our baby becomes noticeably calmer as soon as we put on the sleeping bag.
I was recommended one for babies aged 8 months and older, with a minimum weight of 10 kg. However, it turned out to be too big for our child, so I am selling mine to buy a smaller one.