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Ski 580 I-Soft Thermal Underwear Base Layer Top Women's

Sale price: $20.00 Regular price: $29.99

Enjoy the unprecedented comfort of this incredibly soft 2nd skin thanks to its I-Soft technology (brushed fabric).

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Sale price: $20.00 Regular price: $29.99

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San Francisco, 735 Market St. Options

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Model: 8548187

Product Videos

Product Features

A photo of the Ski 580 I-Soft Thermal Underwear Base Layer Top Women's in use

Ski 580 I-Soft Thermal Underwear Base Layer Top Women's | Designed for medium-intensity skiers (high perspiration) in cold weather, looking for a comfortable and extremely soft second skin.

Enjoy the unprecedented comfort of this incredibly soft 2nd skin thanks to its I-Soft technology (brushed fabric).

Moisture wicking

GOOD: intelligent bodymapping for effective transfer and fast drying.


AVERAGE: bodymapping integrated into brushed component for a feeling of warmth

Irritation reduction

Seamless Technology: fewer seams to reduce irritation.

Odor control

AVERAGE: polyamide fiber has a medium capacity to reduce odors.

Product Customer Reviews

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826 Reviews
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Ski 580 I-Soft Thermal Underwear Base Layer Top Women's,black
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Very Comfortable

Comfortable, warm and looks great!

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Hi Kim,

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

We are very glad to know that it fits you well and that you are comfortable and warm. We hope to see you again soon!


L'équipe Décathlon Ottawa

The Ottawa Decathlon team

Brilliant base layer

As with the leggings this top was fantastic...well worth the money. So light and comfortable and fits under anything. Will wear for cycling and skiing !

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A must have for the winter!

Simply excellent and so comfortable!

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Felt great

Felt breathable yet kept me warm. Didn't smell even after a few days wear!

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Brilliant buy.

Great too wear every day for work as I work in a cold environment. Size was as it states, I'm a medium and I bought a medium and it fits perfectly.

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Excellent product.

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Bad, Best To Avoid

Bad, torn, doesn't keep warm, rolls upwards

Hello Shreya,

Thank you for your review.

I am sorry to hear about your experience with our product.

To address your concerns Shreya,

> the warmth of the ski base-layer depends directly on the layering & warmth retention of the fleece and jacket on top of this.

> the length of the top at the sleeves is purposefully smaller than normal to fit well with the other layers that need to be worn.

I hope this helps & we hope to serve you better in the future.

Have a nice day!


Jaswinder Singh Maan.

Merchandiser, Decathlon Sports India.


Kept me away from chills and I could enjoy my trip well in Finland

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Women's Ski Base Layer Top I-Soft 580 Black/Purple

Do not buy. This base layer top is badly designed. It bunches up at the waist and makes it look like a tyre on the waist.

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Hello Yashoda

Thank you for taking the time to give your valuable review. We are sorry that you were not satisfied with the product. However, we were unable to understand the main issue with the product. Please write back to me with the issue you faced with the product so that we can provide you the best possible solution.


Product Trainer and Passionate Backpacker

Not so warrm

Cheaper version from wedze apparently felt warmer than this.

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Hello Sir,

Thank you for writing to us, this particular product is best when the body is in an active state and also for better breathability with great wicking properties.


Not worth the price

I hardly wore this for 2 months and the fitting went bad . Too much effort to wear . The heating is good but not worth the price

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Hello Maam,

Thanks for writing to us,the product you have bought is the one of the finest thermal we have in decathlon.Yes, the shape of the thermal might go vary but the warmth and the functionality will not change.

This shape is due to the elastane present in the product which gives a second skin effect to trap the warm air in between the layers.




comfy wear

comfortable & soft to wear :)

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Wonderful fitting, happy with the product, thanks decathlon

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Inside warmer

Its a great product, got it for my daughter as a set. Very good quality and keeps her warm.

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Size Guide

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Additional Product Information


Main fabric: 96.0% Polyamide, 4.0% Elastane

What is the fit of the i-soft base layer?

The I-Soft base layer comes in a SLIM fit.It acts as a tight-fitting 2nd skin which reduces friction.

What are the benefits of polyamide?

Polyamide has the highest strength of all textile raw materials (even when wet) and is very stretchy.This breathable fiber enables very good moisture management, reducing odors thanks to its natural properties as well as good temperature regulation.These specially textured super-soft yarns give fabrics a silky, natural feel. Ideal for tight, seamless clothing.

Technical structure of the product

Thanks to its intelligent bodymapping and brushed polyamide fiber created from I-SOFT technology, this 2nd skin will ensure you feel a warmth that is distributed evenly over the whole body.

What is i-soft technology?

I-Soft technology enhances the fabric's performance, providing a variety of benefits: softness, warmth, and next-to-skin comfort. It also enhances garment performance, providing better heat regulation, humidity absorption, and thermal insulation. To achieve this softness, the base layer is brushed.

What is i-band technology?

I-Band technology is an innovative design used around the waist of the I-Soft top and bottom base layers. It helps keep the garment in place so that it doesn't ride up or fall down when skiing.

How to dress to stay warm on the slopes?

You just need 3 layers to keep dry on the ski slopes:- Layer 1 or a 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 the elements.

A product-specific environmental rating

The product's environmental footprint is calculated for its entire life 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 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.). Our design teams ensure that the program for which the product was designed and developed corresponds perfectly to 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