• Baby Merlin's Magic Sleepsuit

  • Halo Cotton SleepSack Swaddle

  • How We Tested

  • What You Should Know About Sleep Sacks

  • Other Sleep Sacks We Tested

  • More Articles You Might Enjoy

Our Favorite Sleep Sacks of 2020

  1. Best Overall

    Baby Merlin's Magic Sleepsuit

    Pros

    • Great for transition from swaddle to sleep sack

    • Machine washable

    • Works like magic for many babies

    Cons

    • Short-term solution

    • Cotton version needs to hang dry after machine washing

    • Thumb sucking babies may find it hard to get their hands to their mouths to self soothe

    Skip to the full review below
  2. Best Value

    Halo Cotton SleepSack Swaddle

    Pros

    • There are many different colors and patterns to choose from

    • One of the most affordable options

    • Inverted zipper allows for easy diaper changes

    Cons

    • Some users have had issues with faulty zippers

    Skip to the full review below
Baby Merlin Magic Suit
Credit: Reviewed / Lisa Lawrence

The Baby Merlin Magic Suit took our top spot.

Best Overall
Baby Merlin's Magic Sleepsuit

This sleep sack, if you can even call it that, was not meant to be in our arsenal of test products. A friend gave it to me during the dreaded 4-month sleep regression, when nothing was working and our baby was up crying and nursing all night long. During those moments of desperation, we parents have been known to try absolutely anything, including straight up magic.

In our house, we lovingly referred to our suit as the marshmallow man suit. This sleep suit deems itself as the “best swaddle transition product on the market today,” which proved to be very accurate in our case. Its patented design helps transition babies from the swaddle by providing a cozy and secure sleep environment.

I would have moved on to the 6- to 9-month Magic Sleep Suit, but at our baby’s 6-month doctor’s appointment, I mentioned that he was sleeping in the suit and had been for close to six weeks. Our pediatrician recommended switching to a regular sleep sack. She was worried about the padded suit impeding his ability to roll over at night and thought it could lead to a developmental delay.

Once we took him out, he did start rolling onto his stomach to sleep and slept much better in general. And now that he’s 9 months, our baby sleeps primarily in his Halo Sleep Sack. I do recommend this product, but I would consult your pediatrician and know that this is a very short-term transition item, and not something they should spend several months sleeping in.

Pros

  • Great for transition from swaddle to sleep sack

  • Machine washable

  • Works like magic for many babies

Cons

  • Short-term solution

  • Cotton version needs to hang dry after machine washing

  • Thumb sucking babies may find it hard to get their hands to their mouths to self soothe

Halo Baby
Credit: Reviewed / Mike Roorda

The Halo is effective and affordable.

Best Value
Halo Cotton SleepSack Swaddle

After I was done with all of the official testing, this product has remained my go-to sleep sack, and I may just have my son sleeping in one of these until he goes to college… or at least until he can say the word “college.” The Halo Sleep sacks come in various colors, patterns, fabrics and runs from preemie sizes up to extra large, which can be used to keep your 2-year-old warm.

The material feels nice and breathable—but warm—and the shape of the swaddle allows for easy maneuvering for babies who like to sleep on their stomachs. My son also has no problem standing up in his swaddle, which he likes to do most mornings while yelling, “maaaaammaaaa!”

Pros

  • There are many different colors and patterns to choose from

  • One of the most affordable options

  • Inverted zipper allows for easy diaper changes

Cons

  • Some users have had issues with faulty zippers

How We Tested

The Tester

Hi there! My name is Ilana Cohn and I am a writer and performer living in Los Angeles. I love reading about the latest baby gear and sharing my opinion, so I was excited to have the opportunity to review more products that have been helping me get baby number two into good sleep habits. While every baby is different, sleep is universally necessary and important, not only for physical growth and brain development, but also for our sanity, as parents. So anything that aides the process of sleep is golden in my book.

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The Tests

At around 3 months it was time to say goodbye to the swaddles that we had become pretty dependent on for getting our son to sleep. My little guy either outgrew, would break out of the bigger ones, or be so frustrated over being stuck in them, that we knew it was time to move to the sleep sack.

I tested the sleep sacks in the same manor that the swaddles were tested. Each sleep sack was tested through at least two sleeps and revisited a month later. Although we did have an almost two-month stretch when I would only sleep our baby in the Magic Merlin’s Sleep Suit—it was the only thing that was working, which is the main reason why it’s in our number one spot.

With all of the sleep sacks we looked at fabric properties and quality, ease of use, any special features, storage, fit, comfort, adjustability, ability to change a diaper, and overall experience.

What You Should Know About Sleep Sacks

According to the American Academy of Pediatrics, you should not put an actual blanket in your baby’s crib until after 12 months. Luckily, there are plenty of wearable blanket options to keep our babies safe and cozy while they sleep. The main things to consider when selecting one of the many options available are: durability, comfort, warmth, and cost. If organic cotton is important to you, you could be looking at spending close to $100.

If you’re looking to have one sleep sack to get you from infancy all the way to toddlerhood, they do exist, but you may have to deal with resizing it, and your baby may not find the early stages of the swaddle/sleep sack combo as comfortable, since the fabric will need to be bunched.

Wearable blankets come in many different materials making it easy to select the appropriate sleep option for your baby in any climate.


Other Sleep Sacks We Tested

Aden + Anais Classic Muslin Sleeping Bag

These sleep sacks are soft, cozy and beautiful. Much like the Aden + Anais swaddle blankets, I am also a huge fan of these adorable, affordable sleeping bags. The muslin blanket material is so soft, lovely, and very conducive to sleep. In my experience these sleep sacks were made to last. I still have a couple of my daughter’s favorite ones from over six years ago, that my son is now happily using.

Pros

  • Comes in the most adorable patterns

  • Material feels so soft and luxurious

  • You can find them in most baby stores

Cons

  • Material may shrink a bit in the washer and dryer

  • Some users have had issues with the fabric ripping

  • Not warm enough for winter months

Nested Bean Zen Sack Classic

This newer product was one of my favorites of the bunch. I liked the Nested Bean swaddle as well, but in my opinion, this classic sack really worked. I think the material and the cut of the actual sleeping bag makes it a great option to have on hand. They are designed really well, with just one button on each shoulder and a zipper that goes around the perimeter for easy diaper changing. Also the fabric is so soft and comfortable that it makes me wish they started making adult sleeping bags.

I’m not sure if the Nested Bean weighted pressure pads that claim to trigger the “cuddle effect” actually work, but even without the cute little weighted bean, I would want to use this sleep sack and my baby agreed. It was one of the ones that worked best for getting him to sleep without being rocked or nursed.

Pros

  • Material 100% breathable, extremely soft cotton

  • Two-way zipper makes nighttime diaper changes a breeze

Cons

  • One of the higher priced sleep sacks

  • Weighted chest area doesn't seem effective

  • Weighted chest piece may be uncomfortable

Baby Deedee Sleep Nest Lite

This sleep sack had the same pros for me as the Nested Bean in that it is made with a really soft and comfy material, and has a similar snap on each shoulder. Unlike the Nested Bean, this has a zipper down the middle, so getting the sleep sack onto your baby is slightly easier, but diaper changing is maybe a bit harder. The zipper on this one does open from bottom to top though, which is helpful.

This lightweight cotton jersey feels breathable but still heavy enough to keep your baby warm through the night. I know that Baby Deedee also makes quilted, extra warm blankets, that I’m sure are lovely, but maybe just a bit too warm for our Los Angeles winters. But if you were in a colder climate, those would be worth checking out.

Pros

  • Oversized zipper is reversible and seems to be of really good quality

  • Jersey cotton material is breathable and extremely soft

  • Designs are simple and cute

Cons

  • May be too warm for some babies

  • Opening at the neck is a bit wide

  • If you have a smaller baby, these might be too roomy

Woombie Grow With Me Swaddle

This item definitely climbed up the charts with age. For me, as a swaddle, it missed the mark. It was just too bulky, but as it opened up, it became much more manageable. Also, when you stop having to get all the buttons closed right, and just have it fully open, it feels much simpler.

This one was always one of my favorite looking swaddles with its cute llama pattern, called “no drama llama.” The fabric has a nice feel as well. If you have an average length baby, you could use this swaddle until they hit a year. Our baby however, is hoping to be an NBA player and is currently off the charts in length, so we’ve sadly had to retire our llamas.

Pros

  • Ability to transition from the newborn stage to 9-12 months

  • Super cute patterns

  • Two-way zipper

Cons

  • Fabric is too bulky when they’re tiny

  • Area where their arms come through is on the smaller side

  • Material doesn't feel particularly soft

Halo SleepSack Easy Transition

This quilted sleep blanket is probably the one closest to the Magic Merlin’s Suit, but for us it didn't work. Our baby did like this one, and I think it’s a good option for switching from a tight swaddle to a sleep sack situation, but the fit and cut of this one are both a bit strange. The arms are covered, but only partially, and it always felt weird to have long sleeves on underneath, but short sleeves would leave a good portion of the babies arms exposed.

I did like how slim the fit in the middle section was and, unlike the Merlin Suit, babies are able to freely move their legs around for healthy hip growth.

Pros

  • Quilted material is really nice

  • Bridges the gap nicely from swaddle to sleep sack

  • Plenty of room for babies to freely move their legs

Cons

  • Odd cut leaves their arms exposed and cold at night

  • Not a ton of options for colors and patterns

  • Expensive

Baby Deedee Sleep Nest Teddy

Similar to the Baby Deedee Sleep Nest light, this sleep blanket also has the two shoulder snaps and large vertical zipper that goes down the middle. The Teddy we were testing is made with a fluffy faux fur that made it slightly too warm to be our go-to nighttime blanket. I did however, really love the feel of this blanket and thought if we were in a cooler climate this would have been a great option.

I was only able to have the baby sleep in it a couple of times, but he did seem pretty warm in it. I think my baby, like me, tends to run a bit on the hotter side.

Pros

  • Material feels high quality

  • Sizes last for 6 months

  • Two-way zipper makes diaper changing easy

Cons

  • May be too warm for most babies

  • Minimal styles and patterns to choose from

  • Expensive

Halo Micro-Fleece SleepSack Swaddle

For me, this fleece number worked great as a swaddle, especially when we took our baby up to Yosemite for a camping trip last summer when he was just 2 months old. It proved to be great, warm coverage in those 40-degree nights, but this particular model also totes itself as a “sleep sack” and for me, it misses the mark on that front. My baby did not like this as a transition option. I think overall it’s just too bulky to try and use as a sleep sack. The flaps work great to hold down baby’s arms, but when they were just around his mid section it just seemed like too much material.

Pros

  • Material is soft

  • Affordable cold weather option

Cons

  • Too bulky and not the right fit to use as a sleep sack

  • Velcro clasp is extremely loud when pulling apart

  • Tends to attach itself to other laundry in the washing machine

SwaddleDesigns Omni Swaddle Sack with Wrap

The Omni has an adjustable wrap and sleeves with mitten cuffs. The website description says, “The convertible design supports more sleep positions for baby's hands and arms, and provides parents with more options when preparing baby for safe sleep.” However, this one just didn’t work for us. It was cute and the material was nice, but I think maybe it was just shaped for a smaller baby. Really I’m not sure what the problem was, maybe the cut of the swaddle just didn’t work, but the reviews on Amazon are mostly positive, so this could work for your baby, even if it didn’t work for ours.

Pros

  • Well priced

  • Material has nice feel

  • Velcro is very quiet

Cons

  • Sleeves seem to be too short

  • Overall length seems to be too short as well

  • Material, while soft, doesn’t seem to be as breathable

Meet the tester

Ilana Cohn

Ilana Cohn

Contributor

@ilanainla

Ilana Cohn created the show Overdue for AwesomnessTV, where she worked as the showrunner and directed an episode of the series. Ilana also created the series 4th Period Lunch for Mondo Media, Jingle Hit Factory for Nickelodeon, Embarrassing Mom for Disney and the Delores DiGagorio Series for Fremantle Media, for which she won a Webbie Award. Acting wise, Ilana was recently on It's Always Sunny in Philadelphia, she's in the cult film Detention, and has done voices on Comedy Central's South Park. She is a mother of two and works in Los Angeles as a writer, director and stand-up comedian.

See all of Ilana Cohn's reviews

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