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Thermal Underwear Base Layer Pants, Kids'

Sale price: $9.99 Regular price:

A warm and comfortable base layer featuring a brushed component, flat seams, and stretch mesh.

Color: Select a color
Size: Select a size
Sale price: $9.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8343743

Product Videos

Product Features

A photo of the Thermal Underwear Base Layer Pants, Kids' in use

Thermal Underwear Base Layer Pants, Kids' | Our team has developed this skiing base layer for kids. It will bring them the necessary warmth for a great day's skiing.

A warm and comfortable base layer featuring a brushed component, flat seams, and stretch mesh.

Moisture wicking

Component encourages wicking and minimal drying.


High: brushed interior for warmth.

Odor control

LOW: The polyester fiber has limited odor-reduction properties.


Knitted with very soft thread for extra comfort and softness.

Product Customer Reviews

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3697 Reviews
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Thermal Underwear Base Layer Pants, Kids'
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Excellent but VERY small

I ordered the top and bottom for my 7 year old daughter. She is a US size extra small to small (6-7), and she’s very small and short for her age, so I ordered the size 8 years. It was entirely too small. I then ordered the 10 years size and it’s a much better fit. Besides the fit, the quality of the item seems great! There were no weird smells or anything either. Great kids Baselayers, but especially for the price, it’s a steal. Can’t recommend enough - just size up at least two sizes.

Wait Cord

Hi, This item is awesome, just one adjustment a waist cord for skinnier kids. Thank you.

Good quality

Good quality

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Warm but short

Warm base layer for kids, size is smaller than expected, with legs quite short even with my average height child.

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Warm base layer

Warm base layer, you need for winter. It is cozy and comfortable.

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Great value

I bought these for my kids to wear as a skiing base layer on days when the weather isn’t frigid. They fit well and keep their legs warm, but not too warm. A great buy for the price!

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Seems warm

Seems good enough for the price you pay.

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Hi Samya,

Thank you for taking some time to review our Kids' Ski Base Layer Bottoms - BL 100 Black.

We hope your kid could keep warm during their outdoors activities by getting the right layers!

We'd love to see you again very soon,



Communication Leader, Décathlon Ottawa

Excellent product

Affordable price and quality is good

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Hello Payal,


Thank you for taking the time to write to us about your product experience. We truly appreciate your feedback.


We would really appreciate it if you could also drop us a google review, it will help others find out about our store easily: 


Wishing you a fantastic day :)

Thanks & Regards,

Decathlon Brampton Team

Great for trick or treating

My child refused to wear a jacket on top of his costume so this served its purpose! And it is not only for skiing. Just a really good buy!

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Kids thermal wear

Good quality, brilliant prices

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Winter essentials

My kids love these and they do the job brilliantly

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Very good quality in a good price

My son loved these thermals Recommended them

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Kids football

I’ve bought these for my son as a way of staying warm during training, perfect

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Really lovely material maximum warmth and well priced

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Additional Product Information


Main fabric

  • 100% Polyester cationic, 100% of the thread is dope dyed

What is the fit of the kids' bl100 base layer pants?

The Kids BL100 base layer is cut to provide a regular fit. It is a classic straight cut that adapts to all body shapes.

What are the benefits of polyester?

Polyester is the most-used fiber for base garments because it is relatively inexpensive and offers excellent performance in various respects, and especially because the fibers can be knitted to obtain a very lightweight and durable fabric. It actively absorbs moisture but does not dry particularly well when wet.

Determining the environmental impact of our products

The environmental impact of the product is calculated over its entire lifecycle and using various indicators. An overall score from A to E is given to help you easily identify the most eco-friendly products by comparing products of the same type (T-shirts, pants, backpacks, etc, ...).



Product testing

All Wedze products are conceived, designed, and developed in the Mont Blanc Valley. They are then tested under the same conditions as you would experience in real-life use (snow, cold, powder snow, etc.). The design teams ensure that the program for which the product has been designed and developed matches perfectly with its use in the field.

Storage instructions

Dry thoroughly before storing.

Care instructions

Wash before first use. Machine wash at 30°C. Synthetic cycle. Turn inside out. Dry flat in a well ventilated place. Do not tumble dry. Do not dry clean. Do not iron. Do not place on a radiator.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual