Dream Merino™ for core daily warmth

Thousands of parents love merino

Merino Singlet Bodysuit

$500–24 months

Sleeveless Australian merino keeps baby’s core warm and dry without bulk.

  • A light layer under everyday clothes
  • Envelope neck, on over the head or up from the legs

Buttersoft superfine merino releases moisture vapor before skin chills. It is made to go under clothes: the neck and armholes are bound, the envelope neck goes on over the head or up from the legs, and three Forever Little blue snaps are backed with cotton webbing so they will not tear the knit.

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Ali Hui, Co-Founder and Product Designer of Forever Little

A note from AliCo-Founder & Product Designer

“Babies lose and build heat through their core. I designed this sleeveless singlet in superfine Australian merino to keep their chest and back dry and warm under any outfit, with pull-down envelope shoulders and webbed snaps that never rip.”

Ali Hui

Temperature regulatingMoves sweat as vaporGentle on sensitive skinMachine washable
How does this singlet layer?

It is a sleeveless base layer made to go under other clothes. By day, wear it under a top, cardigan or vest. At night, wear it under a long-sleeve sleeper or our 3-Seasons sleep sack. It keeps their core warm without bulky sleeves.

How do I choose a size?

Sized by age: 0–3 months, 3–6 months, 6–12 months, and 1–2 years. The stretchy knit fits close to the body as a base layer. If between sizes, size up for growing room.

  • Length: 14 in35.5 cm15¼ in39 cm16¾ in42.5 cm17¾ in45 cm
  • Shoulder: 7 in17.5 cm7½ in19 cm8 in20.5 cm8¾ in22 cm
  • Chest: 8¾ in22.5 cm9½ in24 cm10 in25.5 cm10¾ in27 cm
  • Hip: 8¾ in22.5 cm9½ in24 cm10 in25.5 cm10¾ in27 cm

Measured flat. Allow about ½ in (1 cm) either way.

Why an envelope neck?

The envelope neck goes on over the head or up from the legs, whichever is easier. After a diaper blowout, you can pull the singlet down over baby’s shoulders and hips, so messy fabric never comes up past their face.

What reinforces the snaps?

Three Forever Little blue snaps close the front flap, and we stitch durable cotton webbing behind each one. This stops the snaps pulling through or tearing the fine, stretchy merino knit over daily wash and wear.

How do I wash it, and will it shrink?

Wash it once before first wear to rinse out loose fibers. Then machine wash on a gentle wool cycle with liquid wool detergent. Dry it over a rack in the shade, out of direct sun, because sunlight can discolor merino. Do not tumble dry, soak, or bleach. Our superwash merino resists shrinking on gentle cycles.

Thousands of parents love merino

Sophie H.
The sleeveless cut is perfect for layering. It goes under everything without bunching at the arms.
1.2K
LikeReply12d
Sienna P.
Wool for a baby sounded fussy to me, but it's a gentle wool cycle and hang to dry. That's it.
847
LikeReply35d
Nadia R.
So soft. He wears it under his shirts all week and it washes beautifully on a gentle wool cycle.
2.3K
LikeReply48d
Harper G.
We were a bamboo family until this. Bamboo always felt damp and clingy to me. Merino feels dry and soft.
596
LikeReply67d
Molly E.
Merino was the best switch we made this year. She's comfortable on chilly mornings and doesn't get sweaty by lunch.
1.8K
LikeReply9d
Lauren P.
I love that it's one thin layer of merino. Warm on cool mornings, and he's not overheated once we're inside.
412
LikeReply23d
Rebecca S.
Bamboo was soft for about five washes. This has stayed soft the whole time.
3.1K
LikeReply41d
Grace T.
The bound edges are so smooth, no red marks at all. I'm buying a few more to keep in rotation.
729
LikeReply56d
Tessa M.
You can feel the quality of the Australian merino straight out of the box. Nothing else we own compares.
1.5K
LikeReply78d
A parent in a blue T-shirt holds a baby in a Sage merino singlet bodysuit against his shoulder in a garden with flowers and a white house behind.

A first layer with arms left clear

Keeping baby’s core warm and dry makes the whole day easier. Superfine Australian merino naturally regulates body temperature, while sleeveless styling layers neatly under daytime clothes. The envelope neck pulls down for fast, mess-free diaper cleanups.

A light, stretchy fitReady for the laundry

The sheep tried telling us all along

The same fleece that carries sheep through hot days and cold nights now protects your baby’s skin.

A sheep and lamb standing together in a green field
Nature had a head start.

Materials, from fiber to fabric

  • Woolmark
    Woolmark® certified merinoMeets standards for fiber content, performance, color fastness, and dimensional stability.
  • OEKO-TEX STANDARD 100
    OEKO-TEX® STANDARD 100The textile has been tested for harmful substances.
See what the fiber does ↓
Small fibers. Remarkable things. Parted Merino fleece reveals the fine, naturally crimped fibers inside

How does merino work?

Nature’s temperature buffer.

Holds warmth, breathes out heat

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 fabrics.

What research reveals about wool sleepwear and skin

Independent studies on superfine wool explain why we build sleepwear around merino.

The University of Sydney
Sleep · 2016
63°Froom temperature tested
Faster sleep onset than cotton

Sleeping in wool promoted faster sleep onset compared to cotton, in a laboratory study of 17 young adults at 63°F.

University of SydneyNature and Science of SleepRead study
Murdoch Children's Research Institute
Skin · 2017
39children, 4 weeks–3 years
Lower eczema severity scores in superfine merino than cotton

A 12-week crossover trial of 39 children aged 4 weeks to 3 years, comparing superfine merino clothing with standard cotton.

Murdoch Children’s Research InstituteBritish Journal of DermatologyRead study
WoolmarkNC State University
Temperature · Research program
4yrsof thermal regulation research
A steadier next-to-skin microclimate in wool than synthetics

Sportswear trials examining next-to-skin microclimates during temperature shifts.

Woolmark / NC StateResearch overviewRead more

These studies evaluated wool clothing and textiles generally, not this specific bodysuit. They explain why we choose merino; they do not show this product treats eczema or helps babies sleep longer.

The truth about baby sleep fabrics

Not all soft fabrics breathe. Here is how natural merino compares to rayon viscose and polyester next to baby skin.

Fiber propertyOur choiceMerinoBamboo viscosePolyester fleece
Moisture managementVents moisture vaporHolds wet liquidTraps sweat
Temperature shiftsNatural crimp insulatesCold when wetProne to overheating
Fabric processingNaturally grown fiberChemical solvent bathPetroleum plastic synthesis
Softness next to skinSuperfine, not scratchySmooth and softDepends on finish

In textiles, “bamboo” means rayon viscose made by chemically dissolving plant pulp.

Thoughtful details for everyday wear

Nurse-designed construction for delicate skin and easy changes.

Three blue snaps, webbing-backedThree Forever Little blue snaps close the front flap. Cotton webbing sewn behind each one anchors it in the stretchy knit, so it will not run or tear.
Soft bound edgesThe neck and armholes are finished in the same superfine merino, so there are no scratchy seams against delicate skin.
Core temperature balanceBreathable Australian merino keeps chest and back comfortably dry without adding bulk beneath clothes.

Frequently asked questions

When would I choose the singlet over the bodysuit?

Choose the singlet when you want core merino warmth without sleeve bulk under tops, cardigans or long-sleeve sleepers. Choose the long-sleeve Bodysuit for full-arm coverage.

Will this wool itch or scratch my baby’s skin?

No. We use superfine 19.5 micron Australian merino. The fibers are microscopically slender and bend softly against infant skin without prickling.

Can I layer this under a sleep sack?

Yes. It is an ideal base layer under our 3-Seasons or Quilted Winter sleep sack. Check the layering chart on our sleep sack page for nursery temperature pairing.

Why choose merino over bamboo?

The FTC states soft “bamboo” is rayon made with harsh chemicals. Rayon viscose holds wet sweat in the fabric; merino releases moisture as vapor, keeping baby dry.

What does 19.5 micron mean?

Micron measures fiber diameter. Lower micron numbers mean finer, softer wool. At 19.5 microns, our merino feels butter-soft against sensitive newborn skin.

How do I wash it, and does it pill?

Machine wash on a gentle wool cycle with liquid wool detergent, and dry it over a rack in the shade, never in direct sun. A little pilling is normal, and a battery lint shaver takes it off easily.

Baby sitting on a grey rug in a bright living room in a Baby Blue merino singlet bodysuit, holding a wooden block

Better comfort starts with what touches their skin.

  • Designed by former nurse Ali Hui20+ years making baby merino with a focus on skin comfort.
  • Woolmark® certified merinoMeets standards for fiber content, performance, color fastness, and dimensional stability.
  • OEKO-TEX® tested fabricThe textile has been tested for harmful substances.
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