Babbily GrowProof Thermo-Leggings, innen angeraut – Mädchen mit Roller in dunkelblauer Leggings mit verstärkten Knien

Children’s Thermal Leggings

80+ / navy
€46,99
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Babbily GrowProof Thermo-Leggings, innen angeraut – Mädchen mit Roller in dunkelblauer Leggings mit verstärkten Knien

Children’s Thermal Leggings

One favourite pair of leggings for 3–4 sizes

€46,99
Taxes included. Shipping calculated at checkout.

✓ Brushed inside

✓ Robust knees

✓ Grows with your child 

✓ Waistband & length adjustable

Size
Colournavy

Shipping: AT €4.95 | free from €90

DE €10.90 | from €100 €5.95 | free from €175

Size tip: Don't size up. Choose by your child's current height — the room to grow is already built into the cut.

Green Product Awards 2025 finalist
Green Product Awards 2025 finalist
Made for Mums 2024 Gold
Made for Mums 2024 Gold
EU Production
EU Production
Certified organic fabrics
Certified organic fabrics

Just slip in – your child can manage alone at nursery

Warm but breathable - also for playing indoors

Robust knees with Cordura® - knee patch reached 100,000 rubs (Martindale)

Adapts to your child - nothing digs in

Try on at home at your leisure - 30-day returns

Key features at a glance

Material
Organic cotton terry, brushed inside (250 g/m²), knee patch with Cordura®
Knees
Flexible knee patch with Cordura® (90 % PA66 / 10 % EL), 100,000 rubs in the Martindale test
Fit & features
Adjustable waistband · Grows with your child
Good for
Cold days, nursery, playground
Warmth
Warm
Certification
GOTS-certified organic cotton (KIWA BCS 26126)
Under rain trousers
Yes
Made
Designed in Vienna, made in small workshops in the EU

Thermal leggings made from brushed French Terry – inside layer of the fabric is very soft and warm while outside layer is strong and stretchy. Super comfortable on their own or as a base layer under ski trousers.  Abrasion-resistant knees, adjustable length and waist, and a wide step make these kids leggings an everyday staple. 

  • Ready for shipment in 1-4 working days
  • Designed and tested for durability in Vienna
  • Soft organic cotton in brushed French Terry (soft and fluffy on the inside)
  • Super comfy design with high waist and wide step
  • Robust knees that won´t wear out
  • Adjustable waistband with button elastic
  • Adjustable length with rib cuffs
  • Grows along for 3-4 sizes
  • One pair can replace 3-4 standard pairs
  • Sizes 80+ and 92+ have a nappy allowance

Please check sizing guide for the right fit.

What material are the trousers made of?

Aren't the thermal leggings too warm for indoors?

It is made for the whole day, not just for outdoors. The fabric is brushed on the inside, but is made of organic cotton instead of synthetic fleece. Cotton is breathable and absorbs moisture, so it feels comfortable on the skin even in a heated kindergarten, without the sticky feeling that some polyester fabrics leave behind.

How warm it feels varies from child to child. As a rule of thumb:

  • Indoors and on mild autumn days: wear solo
  • Cold days: with tights underneath

Mud, snow, frost: as a warm layer under mud pants or snow pants

Do the knees really last longer?

Yes. The knee patches on Babbily trousers are specially developed to last much longer than ordinary children's trousers.

While many conventional fabrics show wear after around 10,000–20,000 rubs (source: apshan.com), the knee patch reached 100,000 rubs in the Martindale test (the knee patch was tested, not the whole garment) – many times the strain of normal everyday play. Actual durability depends on use.

Important: extreme knee slides on sports-hall floors – think football goal celebrations – can of course damage this fabric too.

For everything else children do – climbing, crawling, sliding, romping – the reinforced knees are made for it.

Vergleich: Kniebesatz der GrowProof Leggings mit 100.000 Scheuertouren im Martindale-Test

How does Babbily sizing run?

Use your child's current height as a guide.
Babbily sizes are designed to span multiple sizes and are intentionally looser at first.

For more room to grow: Choose based on current height.
For a more fitted look: Choose a size smaller – with correspondingly less room for growth.

💡 Growing with your child needs space – not just in length, but also in width.

Babbily Größentabelle: Babbily-Größe, Körpergröße und mitwachsender Bereich

How do the leggings grow with the child?

In three places:

  • Adjust the waistband: with the buttonhole elastic you make the waistband tighter or looser. Once set, your child can put the leggings on and take them off alone.
  • Turn up the cuffs: the long leg cuffs are turned up at first and rolled out bit by bit as your child grows.
  • Width: at first the leggings fit a little looser, on slim children almost like trousers. As your child grows they fit closer to the body, without restricting.

The knee patch is deliberately cut large so that it still covers the knee after a growth spurt. This way the leggings accompany your child across 3–4 sizes.

How long will these pants fit?

The Babbily pants are designed to be worn for many months – often for an entire year.

The cut gives children plenty of freedom of movement and allows the pants to grow with them for a long time thanks to the elastic waistband and adjustable length.

Of course, the actual length of time they can be worn also depends on how wild your child's adventures are. However, many parents tell us that their Babbily pants are worn for over a year and even passed on to siblings afterwards.

To ensure they fit and last as long as possible:

Do not buy "to grow into"

The room to grow is already factored into the cut. This ensures the knee patches sit exactly where they are meant to protect.

Wash gently

Best at 30 °C and turned inside out. This is gentle on the organic cotton and preserves the surface for longer.

Wear in rotation

Natural fibers appreciate short breaks. If the pants are not worn every single day, they will hold their shape longer.

Shipping + Returns

Shipping time
• Ready to ship in 1–4 business days
• Delivery time after dispatch: AT 1–3 business days, DE 3–7 business days

Shipping costs
• Austria: €4.95 | free from €90
• Germany: €10.90 under €100 | €5.95 from €100 | free from €175

Free delivery applies to full-price items only and cannot be combined with discounts or reduced items.

Returns & exchanges
• 14-day statutory right of withdrawal, voluntary returns up to 30 days after receipt
• Return shipping costs are paid by you
• Faulty or incorrectly delivered items: please contact us first – for justified complaints we cover the return shipping costs
• No direct exchanges – please place a new order for the size or colour you need

Partial returns: free-shipping thresholds and multi-buy discounts are recalculated based on the items you keep.

Questions about returns or help choosing a size: office@babbily.eu

Full details in our refund policy.

Product description

What should my child wear under waterproof or snow trousers in winter?

Under waterproof or snow trousers, a warm, close-fitting layer is especially practical. Fabric that is brushed on the inside keeps your child comfortably warm, stays breathable and fits easily under waterproof or snow trousers without too much fabric bunching up underneath.

That is why our thermal leggings work well as everyday trousers indoors and as a warm layer underneath when it gets wet or really cold outside.

For nursery and school, reinforced knees are especially practical for playing and kneeling on the floor. The grow-along length also helps the leggings fit for as much of the winter season as possible.

Warm, soft and ready for everyday winter life

Children sit on the floor, climb, run, slide and squat. That is exactly why we designed our thermal leggings so your child can move freely in them – just a little warmer.

The soft organic cotton fabric is brushed on the inside and keeps your child comfortably warm without the leggings feeling stiff or heavy. The high, soft waistband sits comfortably on the tummy and covers the back. You set it once with the buttonhole elastic – after that your child can simply put the leggings on and take them off on their own.

So they work just as well indoors as outdoors: at nursery, at school or on the playground. On really cold or wet days, your child can also wear them as a warm layer under waterproof or snow trousers.

Soft like leggings. Robust at the knee

Warm leggings are not much use if the first hole appears at the knee after a few weeks.

That is why we reinforce the knees with an abrasion-resistant 4-way stretch fabric. The patch withstands 100,000 rubs in the Martindale test and stays flexible, so your child is not restricted when climbing, kneeling and playing.

The knee patch is deliberately cut large. This keeps the knee area covered even as your child grows and the fit of the leggings changes.

Grows with your child

Children grow. That doesn't mean well-fitting trousers have to be too small straight away.

Our GrowProof™ thermal leggings accompany your child across 3–4 clothing sizes. You can make the waistband tighter or looser with the buttonhole elastic, and the long cuffs are turned up more or less depending on leg length.

At first the leggings fit a little looser – on slim children almost like trousers. As your child grows, they fit closer to the body without restricting freedom of movement.

So you don't have to buy the next size with every growth spurt.

Organic cotton and production in Europe

For the thermal leggings we use GOTS-certified organic cotton fabrics.

We design our trousers in Vienna and have them made in small batches in Europe. We also pay attention to the materials in the details: the buttons are made of corozo, and the packaging comes without plastic.

Find out more about how we choose fabrics and production partners here.

In short

WARM – organic cotton fabric brushed on the inside for cold days

ROBUST – flexible knee reinforcement tested to 100,000 Martindale rubs

GROW-ALONG – adjustable waistband and length, for 3–4 sizes

COMFORTABLE – soft high waistband and plenty of freedom of movement

MADE IN EUROPE – designed in Vienna and produced in Europe

For children who love wearing their leggings – and parents who don't want to keep buying new ones.

Looking for slightly roomier winter trousers with pockets or an especially warm fleece version? You'll find more trousers for nursery, school and cold days in our winter collection.

Not sure which winter trousers suit your child and your everyday life best? Our guide compares thermal leggings, thermal trousers and fleece trousers – so you can quickly see which one is right for what. Go to the winter trousers guide

Our approach to longer-lasting children's clothing

We develop our GrowProof™ leggings and trousers with one simple goal: they shouldn't be too small or worn through at the knee while the rest is still fine.

Grows across 3–4 sizes
Waistband and leg length can be adjusted. So one size can accompany your child much longer than trousers with a fixed fit.

Knee patch tested to 100,000 rubs
The flexible knee patches are made of an abrasion-resistant 4-way stretch fabric and reached 100,000 rubs in the Martindale test.

GOTS-certified organic cotton
We use certified fabrics from our European suppliers. You will find the certification in the product details.

Made in Europe
Our trousers are produced in small batches in Europe, including in Slovakia.

European suppliers
We source fabrics and other materials from selected suppliers in Europe, including Germany, the Netherlands and Austria.

Small production businesses
We work with small family businesses and workshops that we choose for their workmanship, reliability and production quality.

Plastic-free packaging
Our orders are packed in paper-based packaging without plastic.

Wearable for longer – through construction, not promises

A grow-along fit and particularly abrasion-resistant knees can help a pair of trousers stay in use longer and be replaced less often because of growth or holes in the knees.

Hersteller

Our clothing is made in Austria, Slovakia and neighbouring European countries.

We work with small family businesses that deliver high-quality craftsmanship and 
produce under EU labour law.

Manufacturer

Sunny Bunny e.U. (BABBILY) | Gymnasiumstraße 42 | 1180 Vienna, Austria | Email: info@babbily.eu

Product identification: you will find the model name and size in the product description and product selection.

Safety and usage information: please follow the care and usage instructions given on the product.

Organic Leggings vs. Babbily Grow-Proof Leggings

In the Martindale abrasion test

Durchgescheuertes Loch am Knie einer dunkelblauen Kinderleggings
Standard jersey – no knee reinforcement
Test mit Schleifpapier am Kniebesatz einer Babbily Kinderhose
Babbily Abrasion-resistant knees - 100,000 abrasion cycles

Good to know

Are the thermal leggings warm enough as the only trousers in winter?

For nursery, school and the playground
on cold days: yes. The organic cotton fabric is brushed inside and keeps warm without
being thick or stiff. For rain, mud or real snow, simply pull
mud or snow trousers over them – the leggings fit close
enough that no fabric bunches up underneath.

Does the waistband press on the tummy?

The waistband is made of elastic rib – high, soft and without a cord that digs in. You set it once with the buttonhole elastic – after that your child can put the leggings on and take them off alone, without buttons or zip. Practical for nursery, where this happens several times a day.

How do I wash the thermal leggings?

Wash inside out at 30 °C and skip
fabric softener – this protects colour and fabric. The leggings
don't need ironing; if you do, use low heat only so the
knee patch isn't damaged. Shrinkage during washing is already
taken into account – the fit stays.

Also perfect for playing

  • 5 stars: 2 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Anna R.

Meine 8 jährige Tochter hat eine Leggins geschenkt bekommen und es ist die erste Leggins/Hose die sie jetzt seit fast einem Jahr trägt und sie a)passt immer noch b) ist trotz Pfadfinder und InlineSkate Unfällen immer noch nicht kapput c)immernoch gemütlich und schick.

M
Marina G.

Ich finde die Idee einfach genial! Allerdings würde ich mir bei dem robusten Teil (bei den Knien) etwas schmälere Form, oder auch anderen Formen wünschen. Ich bin mir aber nicht sicher, ob dieses robuste Material in anderen Farben verfügbar ist. Die Qualität ist dafür 1A!!! Weiter so 👍🏻