A 12-week crossover trial of 39 children aged 4 weeks to 3 years, comparing superfine merino clothing with standard cotton.
Dream Merino™ for active toddler warmth
Merino Thermal Layer
Two-piece superfine merino thermal set for active, breathable warmth.
- Top cut longer front and back
- Flat seams prevent rubbing
Breathable Australian merino keeps active toddlers dry and warm, on its own or layered under everyday clothes. The curved hem is longer at the center front and back to cover their back and tuck in easily, and flat seams sit comfortably against the skin.
- Free shipping on orders $100+
- 30-day returns, free size exchanges
- Standard shippingFREE
- 30-day returns, free size exchanges
A note from AliCo-Founder & Product Designer
“Active toddlers build heat quickly when playing, then catch chills when they slow down. I designed this two-piece set with a curved hem, longer front and back, that stays tucked during active play, flat seams that never rub, and merino that breathes naturally.”
Ali Hui
Why choose this two-piece thermal set?
It provides breathable, itch-free warmth under everyday clothing for cool mornings and outdoor adventures. The separate top and leggings can be worn together or as individual layers.
How do I choose a size?
Sized by toddler age: 2YR, 3YR, 4YR, and 5YR. It is a stretch knit made to fit close to the skin for warmth. Check the chest and length measurements in the chart below, then choose their size.
- Top length: 16½ in42 cm17¼ in44 cm18 in46 cm19 in48 cm
- Shoulder: 9¾ in25 cm10¼ in26 cm10¾ in27 cm11 in28 cm
- Chest: 12½ in32 cm13 in33 cm13½ in34 cm13¾ in35 cm
- Arm length: 12¼ in31 cm13½ in34 cm15 in38 cm16½ in42 cm
- Waistband (relaxed): 9 in23 cm9½ in24 cm9¾ in25 cm10¼ in26 cm
- Hip: 10¾ in27 cm11 in28 cm11½ in29 cm11¾ in30 cm
- Leg length (waist to ankle): 19¾ in50 cm21¼ in54 cm23¼ in59 cm25¼ in64 cm
Top length is at the side seam; the curved hem is 2 cm (¾ in) longer at the center front and back.
Measured flat. Allow about ½ in (1 cm) either way.
Why is the top cut longer front and back?
The curved hem is about 3/4 inch (2 cm) longer at the center front and back. It covers their lower back, keeps them warm and tucks in easily.
Are the seams comfortable against skin?
Yes. We use smooth flat seams throughout the entire top and leggings, so there are no thick ridges to rub or irritate sensitive toddler skin under everyday clothes.
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. Do not tumble dry. Our superwash merino resists shrinking on gentle cycles.
Thousands of parents love merino
This set is perfect for days at the park. It goes under his clothes and he's still comfortable when we come back inside.1.2K
Merino was the best switch we made this year. She's comfortable on chilly mornings and doesn't get sweaty by lunch.847
It's thin enough to go under jeans and a sweater without any bulk. A total game changer for our cold school runs.2.3K
Bamboo was soft for about five washes. This has stayed soft the whole time.596
You can feel the quality of the Australian merino straight out of the box. Nothing else we own compares.1.8K
The top and leggings match, and they're so soft. She actually asks to wear them.412
Swapped all our bamboo for merino. Bamboo got clammy as soon as it warmed up, and this just breathes.3.1K
It's held its shape through lots of washes. I'm already eyeing the next size.729
I wash it way less than I expected. Merino just doesn't hold onto smells the way cotton does.1.5K
The sheep tried telling us all along
The same fleece that carries sheep through hot days and cold nights now protects your toddler’s play.
Materials, from fiber to fabric
- Woolmark® certified merinoMeets standards for fiber content, performance, color fastness, and dimensional stability.
- OEKO-TEX® STANDARD 100The textile has been tested for harmful substances.
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 it is chilly outdoors, these air pockets insulate. When toddlers play hard, the weave breathes freely, preventing the sweaty clamminess common in synthetics.
Moves sweat before it turns cold.
The 2 AM solution
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 skin stays comfortably dry, preventing the cold clamminess that triggers 2 AM resettles.
Fresher between washes.
Naturally odor-resistant
Merino wool fibers naturally trap odor molecules inside the fiber structure, locking them away until washing. Their thermal set stays fresher between laundry cycles.
What research reveals about wool clothing and skin
Independent studies on superfine wool explain why we choose merino for clothes worn next to the skin.
Sportswear trials examining next-to-skin microclimates during temperature shifts.
These studies evaluated wool clothing and textiles generally, not this specific thermal set. They explain why we choose merino; they do not show this product treats eczema.
The truth about base layer fabrics
Not all thermal wear breathes. Here is how natural merino compares to rayon viscose and polyester next to active skin.
| Fiber property | Our choiceMerino | Bamboo viscose | Polyester fleece |
|---|---|---|---|
| Moisture management | Vents moisture vapor | Holds wet liquid | Traps sweat |
| 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.
Thoughtful details for active toddlers
Nurse-designed construction for active movement and lasting durability.
Frequently asked questions
What comes in the set?
Each set includes one long-sleeve top and one pair of matching leggings, designed to be worn together or mixed with everyday clothes.
Is this set suitable for sleep?
No. This is thermal base wear designed specifically for daytime layering, outdoor play, and cold-weather activities. It is not sleepwear.
Can the pieces be worn separately?
Yes. Pair the long-sleeve top with jeans for chilly mornings, or use the leggings under rain pants for outdoor adventures.
Will this wool itch or scratch?
No. We use superfine 19.5 micron Australian merino. The fibers are microscopically fine and flexible, bending softly against sensitive skin without prickling.
What does 19.5 micron mean?
Micron measures fiber diameter. Lower micron numbers mean softer fabric. At 19.5 microns, our merino feels smooth and comfortable next to delicate skin.
How do I wash it, and does it pill?
Machine wash on a gentle wool cycle with liquid wool detergent, then 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.
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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