Dream Merino™ for dry, changing nights
Fine merino keeps baby dry and regulates their temperature throughout the night stopping those 2 AM wake ups.
Fine Australian merino sits against baby’s skin, inside a smooth organic cotton interlock knit that takes the everyday wear and keeps the wool soft wash after wash. There’s no filling: merino regulates baby’s temperature on its own, so it doesn’t need the padding lower quality sacks rely on.
“As a former nurse with an interest in wound care, I saw early on how much skin health depends on staying dry. When a baby sleeps in synthetic fleece or bamboo viscose, sweat gets trapped cold against their chest. I designed this sleep sack with fine Australian merino lining inside plush organic cotton so moisture moves away naturally before it ever interrupts their rest.”
Ali Hui
Use this as a starting point, then check baby’s chest or the back of the neck: warm and dry is right.
| Room | What to use |
|---|---|
| Over 75°F | No sleep sack, just a Merino Singlet Bodysuit |
| 72–75°F, warm | 3-Seasons sack + Merino Singlet Bodysuit or a light cotton layer |
| 68–72°F, comfortable | 3-Seasons sack + long sleeve Merino Bodysuit |
| 64–68°F, mild | 3-Seasons sack + long sleeve Merino Bodysuit + footed leggings |
| 61–64°F, cool | 3-Seasons sack + long sleeve Merino Bodysuit + Merino Onesie |
Below 61°F, switch to the Quilted Winter sack.
Yes, in milder rooms across spring, summer, and fall. The merino lining buffers overnight temperature swings. For consistently cold winter rooms, our Quilted Winter Sleep Sack provides extra warmth. The layering chart above shows what to pair it with.
Merino takes up sweat as vapor and releases it before skin turns clammy, but dressing for the room is still key. Check baby's chest or the back of their neck: warm and dry is right; sweaty or hot means remove a layer.
It is one size for 3 to 24 months, made long (37½ inches) so it fits a small baby and still fits at two. For a smaller baby, fasten the snap domes under each arm to make the armholes snug, then undo them as your child grows. Always check the neck and armholes sit snug so your baby cannot slip down inside. Under 3 months, use our Merino Fitted Swaddle.
3–24 mo
One size from 3 to 24 months, made long so it fits a small baby and still fits at two. Fasten the underarm snap domes for a smaller baby and undo them as your child grows.
Measured flat. Allow about ½ in (1 cm) either way.
Yes to machine washing; no to the dryer. Our superwash merino washes on a gentle wool cycle with liquid wool detergent. Do not soak, bleach, or use stain sprays. Open the zip and hang it to dry; airing it open helps it dry faster.
Built for deep, dry sleep through changing nights: natural Australian merino, nurse-designed details, and 30-day returns.
Fine Australian merino lining actively moves sweat away as vapor, keeping baby’s chest dry as room temperatures shift.
Created by Ali Hui, drawing on 20+ years of baby merino design and a professional focus on skin health.
Ships from our warehouse in 1–2 business days and arrives 4–7 days later. Backed by 30-day returns and free size exchanges.
Our nursery swings from warm at bedtime to cool by the early hours, and this is the one sack I don't second guess. It feels soft instead of clammy after a long evening feed.1.2K
I didn't get the hype about merino until we tried it. It's soft, it breathes, and it doesn't smell even after a full day.847
I genuinely didn't know wool could feel this soft. I was braced for scratchy and it's the opposite. It's now the first sleep sack I reach for as the evenings start cooling down.2.3K
We were a bamboo family until this. Bamboo always felt damp and clingy to me. Merino feels dry and soft.596
I wash it way less than I expected. Merino just doesn't hold onto smells the way cotton does.1.8K
Plenty of room for her to kick, and it still looks tidy on. The Rodeo print is even better in person, and the organic cotton outside feels lovely every time I pick her up.412
Swapped all our bamboo for merino. Bamboo got clammy as soon as it warmed up, and this just breathes.3.1K
You can feel the quality of the Australian merino straight out of the box. Nothing else we own compares.729
Nursery temperatures shift overnight. Temperature regulating Australian merino inside a smooth organic cotton knit keeps baby warm without trapped sweat or 2 AM chills.
The zip is closed at the top and opens from the bottom up, so you can change a diaper while your baby’s chest stays covered. The stretchy shape gives hips room to move.
The same fleece that carries sheep through hot days and cold nights now protects your baby’s sleep.
Nature’s temperature buffer.
Merino wool fibers feature a natural microscopic crimp that holds pockets of air. When the room cools down, these air pockets insulate. When the room warms up, the weave breathes freely, preventing the heat buildup common in synthetic sacks.
Moves sweat before it turns cold.
Unlike cotton or bamboo viscose that hold wet liquid against the skin, merino absorbs perspiration while it is still vapor and releases it into the air. Your baby’s chest stays comfortably dry, preventing the cold clamminess that triggers 2 AM resettles.
Fresher between washes.
Merino wool fibers naturally trap odor molecules inside the fiber structure, locking them away until washing. Your baby’s sack stays fresher between laundry cycles.
Independent studies on superfine wool explain why we build sleepwear around merino.
Sleeping in wool promoted faster sleep onset compared to cotton, in a laboratory study of 17 young adults at 63°F.
A 12-week crossover trial of 39 children aged 4 weeks to 3 years, comparing superfine merino clothing with standard cotton.
Sportswear trials examining next-to-skin microclimates during temperature shifts.
These studies evaluated wool clothing and textiles generally, not this specific sleep sack. They explain why we choose merino; they do not show this product treats eczema or helps babies sleep longer.
Not all soft fabrics breathe. Here is how natural merino compares to rayon viscose and polyester next to baby skin.
| Fiber property | Our choiceMerino | Bamboo viscose | Polyester fleece |
|---|---|---|---|
| Moisture management | Vents moisture vapor | Holds wet liquid | Traps sweat |
| Overnight temperature shifts | Natural crimp insulates | Cold when wet | Prone to overheating |
| Fabric processing | Naturally grown fiber | Chemical solvent bath | Petroleum plastic synthesis |
| Softness next to skin | Superfine, not scratchy | Smooth and soft | Depends on finish |
In textiles, “bamboo” means rayon viscose made by chemically dissolving plant pulp.
Two natural fibers and a few special details. Here’s what you’re wrapping them in.
No. Coarse wool scratches, but fine Australian merino has slender fibers that bend softly against delicate skin without prickling.
In a 2017 trial (British Journal of Dermatology), superfine merino clothing resulted in lower eczema scores than cotton. Merino helps keep skin dry, which avoids the dampness that often triggers itching. Read the skin study
The idea that bamboo fabric is natural and healthy is a myth. The FTC states soft “bamboo” cannot be advertised as just bamboo, only as “rayon made from bamboo.” To make it, plant pulp is dissolved in harsh chemicals. (In 2022, Kohl’s and Walmart paid $5.5 million for mislabeling it.) Rayon viscose soaks up sweat and holds it against baby’s skin, so for a sleeping baby it works really poorly. Australian merino absorbs moisture as vapor and lets it evaporate, keeping baby comfortably dry.
It is our lighter sleep sack, made for milder rooms across spring, summer, and fall. For colder winter rooms, our Quilted Winter Sleep Sack provides extra warmth.
Because merino doesn’t need it. The fibers hold warmth when the room cools and let heat and sweat out as it warms, so a merino lining alone keeps baby comfortable. Lower quality sacks made from polyester or bamboo viscose can’t regulate temperature, so they add filling to make up for it. For cold winter rooms, our premium Quilted Winter Sleep Sack adds a 100% merino filling.
The 3-Seasons sack has no filling, just a merino lining inside organic cotton, for milder rooms. The Quilted Winter sack is our premium sack, with a 100% merino filling (about 3.5 TOG) for colder nurseries.
Yes. Because it is a sleeveless sleep sack, your baby’s arms are completely free to push up, roll, and reposition. Always place your baby on their back on a firm, flat surface. Read the AAP’s safe-sleep guidance
Yes. It is made long, 37½ inches, so it fits a small baby and still fits at two. Fasten the snap domes under each arm for a smaller baby, and undo them as your child grows to use the full armhole. Always check that the neck and armholes fit securely before use, and stop using it if the fit is too loose or too tight.
Unzip from the bottom up. Slide their legs out, change the diaper, and zip back down without uncovering your baby’s chest. The zip is closed at the neckline, so the pull always rests low, away from the chin and busy fingers. A soft guard covers the top of the zip.
No. These are independent studies on superfine wool textiles and clothing. They show why merino works well for sleep, not that this product cures any condition.
Unlike synthetic or viscose sacks that get outgrown every few months, our sack is made from certified Australian merino and organic cotton, fits for 21 months (ages 3–24 months), and is built to pass down.
A little, mostly in the first few washes, and that is normal for wool. Wash it once before first wear to release loose fibers. If pills appear, a small battery lint remover takes them off easily. Skip wool combs; they can pull the knit.
Leave your email and we’ll let you know when it’s back.
