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Home of the 4 Season Ultimate Baby Sleep Bag
Made with super soft merino wool, the 4 Season Ultimate Sleep Bag will help keep your baby at a perfect temperature all year round. That means there’s no need to worry about which sleep sack to use, or whether your baby will be too hot or cold while sleeping – they’ll always be just right!
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The Benefits of Wearing Merino Wool
100% Natural, wicking moisture away and regulating body temp., machine-washable, and an excellent value as it comes in a universal size that fits babies from 2 months to 2 years - the Woolino 4 Season Ultimate Sleep Bag is the only wearable blanket your child will need, right up until they turn two.
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Premium materials
100% Natural silky-soft Australian merino wool lining and organic cotton outer.
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4 Season use
Merino’s unmatched ability to regulate body temperature provides perfect comfort in all seasons.
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Grows with your baby
One universal size, 2mo-2yrs. For smaller babies simply close the underarm snaps to adjust the fit.
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Excellent value
Year-round use. You don’t have to buy a different TOG rating sleeping bag every few months.
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Easy care
Machine wash and tumble dry on no-heat setting – no hand washing fuss.
Why choose the Woolino 4 Season Ultimate Sleep Bag?
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 is naturally perfect.
Joseph Glenn
2025-08-06 16:17:13
The best product for infants who can no longer be swaddled. The material is soft, high quality wool. Incredible easy to put the baby in; with the ability to grow as the child grows.We use this for camping, stadium events, family outings. Anything where our child is going to be out past bedtime. The car seat strap holes are fantastic and help to keep the body temp regulated in any climate.Very long lasting material, be sure to read the wash directions! A wool safe detergent and hang dry or hand cleaning.
Praha3
2025-07-16 14:47:23
UPDATED REVIEW:The previous title was "Almost great, but possibly dangerous." Well, it's time to change my review for the better, and for two reasons. One, this sleep sack has become absolutely indispensable. It is more substantial than any other we tried (Gunapod, Baby Deedee sack, and Halo, though admittedly their cotton versions). The problem described below was simply because it comforted Baby so much, he wanted it on his face. Once that scary period was over after a few weeks (we'd sewed the bottom as mentioned until he stopped), we all loved it. It's held up extremely well and now fits my almost one-year-old like a dream, with room to grow.The second reason for the update is that the company contacted me about my concerns, which I truly appreciate. Though they couldn't quite recreate the issue I described, they tried to resolve the problem. Though it wasn't available at the time, they were creating a new 6 to 18 month old size that likely would have been perfect. They had some other recommendations as well. Good customer service keeps me going back to a company, and this will be no different!PREVIOUS REVIEW:This review is very difficult for me to write as I don't like to say bad things about products I loved. BUT. I bought this to replace the many Halo, Gunapod, and other sleepsacks we'd tried. They were not only too thin to keep our baby warm in the recommended 66 - 70 degree room temp, but he quickly grew out of them. Enter Woolino. I loved this product, recommended it to my sister, and bought one for a friend's baby.Here are my positives:I LOVE the feel of this. It's very soft and (at least compared to the others we'd tried) has a good weight to it. My baby no longer seemed ice cold at night. He has room to kick and maneuver his legs as he loves to do. And he looks dern cute in the thing!BUT (I told you it was coming). The length has come to frighten me for my guy. I thought having something that grows with him would be a great money-saver, but as it turns out, the extra fabric is enough so that he can pull it up over his face. And as a six-month-old looking to comfort himself as he falls asleep, he does it often. Every night, in fact. I find myself sneaking into his room after he falls asleep (the first time at night and after night-feedings) and pulling it down. Isn't the point of having a sleepsack instead of a blanket to prevent this exact behavior?If there was a way to do it comfortably, it would be nice to have some sort of Velcro or unobtrusive snaps inside at the bottom to account for different baby lengths. I sewed across the bottom myself finally so he can't pull it up--my solution is ugly but I'm hoping it works.Again, for the right (passive) baby, I love this! But I can't fully endorse it as I see a huge safety issue currently.
Momma Green
2025-07-10 12:54:33
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!
ecarp
2025-06-23 16:14:06
My baby is already a pretty good sleeper but I was worried about transitioning her out of swaddling. First night in the sleep sack and she slept 11 hours straight??? I like how this sleep sack is soft and there's plenty of room for her to grow in it. She's a smaller 2 month old but the arm holes seem to fit well on her. The sleep sack is expensive but I am tempted to buy another one because they seem like a great investment
Xena the Warrior Princess
2025-05-19 15:03:37
My husband loves this wool sleep sack. It is indeed expensive but the quality in the material is there to back it up. It’s nice and thick with great features like the zipper that goes almost all the way around for easy in and out of baby, the snap buttons for the armpits depending on how big your baby is and the easy snaps on top of the shoulders to secure them in at night. Not to mention the cutest sheep ðŸ‘! Just remember that this is wool so you do not dry it in the dryer!!! I’m sure it will reduce the life of the material and also change the texture of it. Our little girl so absolutely so adorable in this sleep sack and we can sleep soundly knowing her temperature is being regulated.
A F
2025-03-10 11:09:20
Parfait doux et chaud mon bébé adore !!! Pas besoin de plusieurs gigoteuse car évolue avec l'âge de bébé. Donc économique.
Heather Booi
2025-03-04 15:13:25
Let me start by saying, this is the first Amazon review I've ever done. That's how much I love this product.My quest resulting in this sleep sack began with researching fire retardant usage in infant sleepwear. I slowly converted all of my 4 month old son's sleepers over to either 100% organic cotton, or ones with a tag that explicitly stated the blurb about wearing snug fitting; no fire retardants. As the weather got cooler, I realized he'd be using a sleep sack and obviously they are not snug fitting, therefore would have to be organic cotton if I wanted to avoid fire retardants. I considered getting one from Parade Organics, although realized it likely wouldn't be warm enough for the winter months (since his sleepers aren't warm fabrics like fleece either, for the reasons above). Enter WOOLINO! It just so happens that I have become a bit obsessed with wool recently, so knew about the antibacterial and water repellent nature of wool. The fact this is good for 2 mos - 2 yrs, and all four seasons made it a no brainer. Add - the fabric being 100% certified organic cotton outer and SUPER soft, naturally fire resistant (without nasty chemicals) merino wool on the inside, and you have a PERFECT product. The price is completely reasonable for how well made it is and what it offers. The first night he wore it, he soaked through his diaper and onto his sleeper - it didn't even touch the sleep sack due to the water repellent wool! That alone makes this worth every penny. The weight of it is so nice as well. He's only been in it for about a week now, but I get the impression it's helping him actually sleep longer! (don't want to jinx it!)I just washed it for the first time today with some Eucalan wash, in my machine on delicates setting (cold, low spin, extra light soil level) and it came out fine. I read that a good way to prevent/reduce pilling is to wash it within the first few wears, so hopefully that helps because there already is a bit of pilling. Really doesn't bother me though considering everything else.The packaging it came in was so beautiful, and one of the best perks is the little room thermometer it comes with! It tells you what sleepwear to have your baby in underneath the sleep sack based on what temp the room is. Genius!I bought the earth colour and it's so beautiful. I would recommend this to EVERYONE :)
Kyle Lisgo
2025-02-17 13:33:39
I absolutely love this sleeping bag and so does my little girl. It was recommended to me by a safe sleep group who are super vigilant and fussy with their recommendations.The fabric is very very soft but not flimsy. The zip is strong and well made. It is covered at the ends so its comfortable for little one. It's got two strong press studs at each shoulder and one under each armpit to make it fit well for little babies. It comes with a thermometer so you can check the room temperature so you can dress baby according to the heat. The thermometer isnt the greatest for getting a precise temperature.It comes with a clothing guide too so you know what to dress your baby in for the right temperature so this helps reduce the risk of SIDSit is a bit more expensive than other sleep suits however your paying for absolute quality and more importantly safety.VERY HIGHLY RECOMMEND.
M. L. Brière
2025-02-13 10:06:47
I got this for a heavier weight than the cotton one we currently use. So far I really like it and baby seems confortable.It’s a nice feeling on both the inside and the shell and it’s easy to get on and off. It also washes well.
Ana
2025-01-21 17:53:46
Wir lieben diesen Schlafsack. Tolle dezente Farbe, qualitativ hochwertiges Material, gute Verarbeitung inklusive Reisverschluss.Obgleich schon zwei Hoppalas passiert sind und der Schlafsack ein wenig heißer als angegeben gewaschen werden musste sieht er aus wie neu und das Material ist weiterhin weich, angenehm und nicht kratzig.Es hält auch trotz stark schwankender Temperaturen angemessen warm, ohne zur Überwärmung oder zu Schwitzen zu führen.Würde ich wieder kaufen.
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