Woolino 4 Season Ultimate Baby Sleeping Bag – Merino Wool and Organic Cotton – Universal Size Adjustable Sleep Sack for Baby – Two-Way Zipper Sleeping Bag (2-24 Months) – Night Sky
$109.00
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Product description
The Ultimate 4 Season Sleep Bag 
100% Natural, wicking away moisture, regulating body temp, and an excellent value as it comes in a universal size that fits babies from 2 months to 2 years – the Woolino Ultimate Sleep Bag is the only wearable blanket your baby will need, right up until they turn two.
Features of the Ultimate Sleep Bag 
All-Season Comfort
Made with superfine merino wool, keeping your little one at the perfect temperature all year round.
Peace of Mind
No more guessing which sleep sack to use. Your baby will always be cozy and safe.
Saves You Money
One bag for all seasons — no need to buy multiple TOG-rated sleep sacks.
Easy Care
Durable and machine-washable – designed for everyday convenience.
Better Sleep
Breathable, moisture wicking merino helps baby sleep soundly. More restful nights for everyone.
Why Choose a Woolino Ultimate 4 Season Sleep Bag?
1 All-Season Comfort 2 Peace of Mind 3 Saves You Money 4 Easy Care 5 Better Sleep
Perfect comfort for better sleep. Naturally. 
The Magic of Merino
Because of Merino wool’s unique ability to regulate body temperature, it helps keep your baby warm when it’s cold and cool when it’s hot. That temperature regulation means that your child will sleep comfortably throughout the night, year-round – and that means a better night’s sleep for you too.
Better and Longer Sleep
A study done by the University of Sydney has found that a better night’s sleep is achieved when sleeping in wool. Merino wool is the perfect fiber to have next to your child’s sensitive skin. It regulates temperature, manages moisture, is easy to care for, soft, and durable. It’s naturally perfect.
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Woolino 4 Season Ultimate Baby Sleep Bag Merchant Video
Woolino 4 Season sleeping bags or sacks made with merino wool and organic cotton
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Customer Reviews
4.7 out of 5 stars 4,087
4.7 out of 5 stars 1,282
4.6 out of 5 stars 1,073
4.7 out of 5 stars 805
4.0 out of 5 stars 24
Price
$109.00$109.00
$129.00$129.00
$93.00$93.00
$109.00$109.00
$149.00$149.00
Fabric
Merino Wool & Organic Cotton
Merino Wool & Organic Cotton
Merino Wool & Organic Cotton
Merino Wool & Organic Cotton
Merino Wool & Organic Cotton
Size
2 – 24 Months
2 – 4 Years
0-6 m, 6-18 m, 18-36 m
0-6 m, 6-18 m, 18-36 m, 3-4T
4 – 6 Years
Underarm Snaps to Adjust Fit
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Shoulder Snaps
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Safety-Belt Slots for Travel
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2-Way Zipper
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Replaces Loose Blankets in Bed
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4-Season Use
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100% Merino Wool Lining / 100% Organic Cotton Outer
Imported
#1 RATED and #1 SELLING merino wool baby sleep sacks in US and Canada since 2010. Creative Child’s 2018 Top Choice of the Year Award & winner of 2021 Cribsie Award and Mom’s Choice Award
REDUCE OR ELIMINATE SLEEPLESS NIGHTS – When baby sleeps better, so do parents. PREMIUM FABRICS for best comfort: Australian merino wool lining – 100% natural, luxuriously soft, and temperature regulating. GOTS certified organic cotton outer
THE ONE AND ONLY sleep sack your baby will need until they turn two. UNIVERSAL SIZE: 2 months – 2 years. 4 SEASON USE: Merino wool regulates body temperature so it can be used year-round.
MAXIMUM VERSATILITY – double shoulder snaps and two-way zipper system for easy dressing and diaper changes; Closable seat-belt slots for easy transfer between stroller, bouncer, crib, etc. Under-arm snaps allow this wearable blanket to grow with your baby and make it the perfect swaddle transition product
PREMIUM QUALITY – Buy with confidence from Woolino, a trusted US company, offering US customer service and industry leading warranty for your peace of mind. The industry leader in merino wool baby essentials since 2010.
9 reviews for Woolino 4 Season Ultimate Baby Sleeping Bag – Merino Wool and Organic Cotton – Universal Size Adjustable Sleep Sack for Baby – Two-Way Zipper Sleeping Bag (2-24 Months) – Night Sky
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$109.00
Momma Green –
Warm, cozy, and economical…
I put off buying this thing for 6 months, due to price, and now I wish I hadn’t waited.Apparently, in order to keep babies from going up in flames, infant sleepers have to be either fleece (which stops being fluffy after only 3 washes), treated with fire resistant chemicals (um, no), or snug fitting (itchy!). Well, I was cheating by buying super big sleepers for my son, and just letting him sleep with floppy footies. Unfortunately, now that he is 9 months, the “snug fitting” sleepers are ridiculously tight, and he was waking up with freezing feet every night, even the fleece sleepers– which are 20 bucks a pop where I live, and have to be replaced every month, because they pile up. Plus, he started crying whenever I zipped them up, because who on EARTH wants to sleep in a compression sack– I certainly wouldn’t. I itch when my tank tops are too tight!So I finally pressed the button and got this little gem. I’ve used wool baby products before, so I would encourage anyone to “lanolinize” this every few months, which helps the wool resist moisture/pee, softens it, and allows you to wash it less, and makes it hang dry quicker. However, this is as soft as Egyptian cotton and the company says it’s washable, so you don’t really need to. (I always handwash with a little Dr. Bronners and lanolin, though, personally).This bag has sturdy snaps (no scratchy velcro), which allow it to be comfy but form fitting on the upper body. Double snaps on the side comform to a smaller or bigger baby. Even though my son has TONS of room in the foot area to grow into, I have zero concerns that he will get twisted up in it… and he’s a hard-core squirmer. Even with his constant caterpillar scooting and rolling, he’s never complained or been uncomfortable in this, and when he does wake up at night, his feet are WARM, because he’s basically sleeping in a giant mitten. It has a zip at the bottom for nighttime changes or, possibly, if you’re kiddos feet are getting hot. There’s an open/close spot at the crotch area for safety belts to go through. Plus, this saves money, because (underneath) the baby is sleeping in the same one-sies or shirts he/she would be using during the day, so you don’t have to keep getting longer foot-ie pyja, or replacing the scratchy fleece ones.Don’t hesitate to buy this wonderful product. It’s cozy, quality construction, and economical, in the long run.Update: still going strong at 2 years, with occasional washing, but no special treatment whatsoever. It’s even been thrown in the regular, high heat dryer several times, although I wouldn’t recommend doing so regularly. My son sees the sack and knows it’s time to “snuggle up” for bedtime. Love it!
Amazon Customer –
Worth the price
Great quality its soft and very well made. I am loving the temperature control aspect, with the changing weather i worry shes too warm or cool, this has helped ease that soo much! This was an easy transition to from the merlin my daughter has been loving.
Eda A. –
WORTH its price!
We used, LTD, Ergobaby, Kytebaby and regular sleep suits.. Baby wasn’t sleeping well. I’m talking about hourly waking ups!! Until I said, risk it, I ordered two of these. Quality and softness extraordinary!! Even though we kept the room between 68 to 72 nothing worked but Woolino! She is sleeping really good now and we will be using this really long time so hundred percent WORTH its price!! Others I spent hundreds and wasn’t able use more than a few months. I’m so happy with this purchase. Cozy sleeping baby 💤
GoldieLikes –
I wish this for every baby!
Love this sleep sack!If you’re anything like me – first time mom over here – I was obsessed with whether baby was too hot or too cold from day one. Overheating or being too cold can be uncomfortable for baby and prevent them from sleeping, and severe overheating has been linked to SIDs. Thus, keeping baby at the perfect temperature – especially as a newborn when they’re bodies are still not able to regulate – has been a constant concern of mine that required much thought and effort and trial and error with what temperature to set the thermostat in our house, how many layers to dress in, etc.For my now 7.5 month old, we’ve been through a number of swaddles and sleep sacks. We live in Los Angeles, so pretty mild weather but still gets chilly in the winter, enough to warrant turning on the heat and obviously, very warm in the summer. We keep the baby’s room between 68-72 degrees, which is the recommended range (an indoor thermostat is a must for baby’s room! We have this one and we’re happy with it: ThermoPro TP55 Digital Hygrometer Indoor Thermometer Humidity Gauge with Jumbo Touchscreen and Backlight Temperature Humidity) In the warmer months we’ve been dressing baby in a lightweight 100% cotton footLESS pajama or long-sleeve onesie with pants no undershirt, no socks and in the cooler months, footed 100% cotton pajamas, sometimes the slightly thicker organic ones, and no undershirt (please, don’t dress baby in polyester, especially not at night, it does not breathe and can cause overheating). The sleep sack comes with a guide as to how to dress for what weather. We basically just followed itThis is a very high quality sleep sack, from the zippers to the snaps, to the soft material and design, the weight is really nice, not too heavy but heavy enough to feel cozy. On a typical spring to summer evening, the temperature in the nursery can range from 72 to 68 or sometimes even 67 degrees farehnheith. The sleep sack keeps baby cool and dry, and warm and cozy. Just perfect. I’m not attributing the fact that baby sleeps really well ENTIRELY to the sleep sack but I do think it has helped. And also has alleviated my concerns and give me peace of mind. Priceless.
Maria Cecilia Herrera –
Super calidad, lo usaron 2 de mis hijos por años
A F –
Parfait doux et chaud mon bébé adore !!! Pas besoin de plusieurs gigoteuse car évolue avec l’âge de bébé. Donc économique.
Daniel Guerra –
Um ótimo saco de dormir. Serve para todo o ano o que evita comprar vários sacos com tog diferentes. O caro sai barato.Pena não haver na Amazon as outras opções:dos 0-6 meses, dos 6-18.
BH –
After trying many sleep sacks, I was tired of constantly thinking about TOG values, size/length, and having back ups for washing. I bought a Woolino and haven’t looked back. They are roomy but customizable to fit baby. They have snap closures at the shoulders so if you have a baby that hates putting their arm through the armhole, these are great. The extra room for growth also means room for movement when my baby is settling and self soothing with some wild movements in the crib. He never gets tangled in it and hasn’t seemed too hot, though we haven’t used this in the summer yet.I’ve washed a few times and it has held up well. Dryer with no heat only, and once in desperation to get the laundry done quickly I did a moderate spin cycle instead of gentle, and it stood up fine. I compared it to a new one that I had bought as a backup and didn’t see any shrinkage after washing in this manner. We had some spit up/throw up/drooling mishaps and there was no staining, but I did wash promptly following any breast milk debris being on it.Very high quality feel. The merino wool has withstood a lot of kicking and pulling from my baby getting his feet up and pulling down on it, stretching and causing friction to the layers. You would never know. Zippers never catch or get caught on the material. Snaps never feel weak or weaken the fabric they are attached to.FYI had it for 3 months and my son is 6 months old. Used swaddle Up, ergo pouch, and halo sleep sacks previously.
Zsofia Chiorboli –
I can only share what other people wrote. This is NOT a 4 season sleeping bag I trusted the recommendations but this sleeping bag is rather thin and I found my baby crying and very cold in this at night, so she consequently was sick for a few days! I feel really disappointed, definitely not worth the price!