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Thermal Underwear Base Layer Top, Men's

Regular price: $9.99 Regular price:

Enjoy a warm and comfortable base layer with a brushed component, flat seams, and a stretch knit.

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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: 8510029

Product Features

A photo of the Thermal Underwear Base Layer Top, Men's in use

Thermal Underwear Base Layer Top, Men's | Designed for skiers who practice at low intensity (low perspiration), looking for a warm base layer in cold weather.

Enjoy a warm and comfortable base layer with a brushed component, flat seams, and a stretch knit.

Moisture wicking

Very low: Component encourages wicking and minimal drying.


Average: Brushed lining for warmth.

Odor control

We have reduced environmental impact by dyeing the thread before weaving it

Product Customer Reviews

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2707 Reviews
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Thermal Underwear Base Layer Top, Men's,charcoal gray
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Thermo top

Perfect. Warm and cozy

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Good inner layer

I actually used this for biking in winter where I can ride up to 25km/h in 8 degrees weather and it gets very cold at that speed with frosty winds blowing at you. It forms a good inner layer for my outer layers.

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Good product

Does the job well

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Ski time

Great value

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Excellent purchase

Soft, warm, excellent moisture handling.

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Hi Virgilio,

Thank you for taking some time to review our ski base layer, we truly appreciate your input!

We are glad to know that it met your expectations and that you are satisfied with its quality.

We look forward to seeing you again soon in your Decathlon Ottawa!

If you'd like to let other sports lovers know about your experience, don't hesitate to leave us a review on Google right here!



Communication Leader, Décathlon Ottawa

Cozy lightweight layer

Good fit for me but sleeves are a touch short. I have long arms and the 2XL usually fit very well. These are a bit shorter.

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Hi Oliver,

Thank you for your review, and sharing details about how the product fits. This will help customers buying in the future and we are always looking to share feedback to enhance the products with the team. We are looking forward to seeing you back in store soon!

Great fit

Great fit and warm

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This is a super warm base. If you are working hard you get hot. It performs well I got 2 and I will buy again.

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Most Wanted!

This is what I’m looking for! Worth the money!

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Great! Happy to hear that you found what you needed

Warm and cozy

I need need something like this. With the colder weather coming upon us. Good match with the leggings too.

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Warm and soft

Warm and soft!!! And VERY GOOD PRICE

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It was for women not men and there was no other color than the white plus limited sizes (not all sizes were available) but the product itself is perfect

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I because my husband hates wearing jumpers so these are perfect for him to wear under his shirts without being restrictive. Can't do counterfeiting thdm

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Great base layer

This is very warm and comfortable to wear.

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Size Guide

Size Guide Visual

Additional Product Information


Main fabric

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

What is the fit of the 100 base layer?

The 100 base layer comes in 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.

How to dress to stay warm on the slopes

All you need is 3 technical layers to stay warm on the ski slopes. Layer 1 or 2nd skin, to stay dry. Layer 2 or an insulating layer, to keep the heat in. Layer 3 or a protective layer, to protect against bad weather.

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.

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