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Seamless Ski Base Layer Bottom - BL 580 I-Soft - Black/Purple

Sale price: $29.99 Regular price:

Enjoy the unparalleled comfort of an incredibly soft second skin thanks to the I-Soft technology (brushed fabric).

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Sale price: $29.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8548387

Product Videos

Product Features

A photo of the Seamless Ski Base Layer Bottom - BL 580 I-Soft - Black/Purple in use

Seamless Ski Base Layer Bottom - BL 580 I-Soft - Black/Purple | Developed for the skier who practices at average intensity (mild perspiration) looking for a comfortable and extremely soft second skin in cold weather.

Enjoy the unparalleled comfort of an incredibly soft second skin thanks to the I-Soft technology (brushed fabric).

Moisture wicking

GOOD: smart body mapping for perspiration wicking and quick drying.


AVERAGE: built-in body mapping with a brushed component for increased warmth.

Irritation reduction

Seamless Technology: fewer seams to reduce irritation.

Product Customer Reviews

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362 Reviews
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Seamless Ski Base Layer Bottom - BL 580 I-Soft - Black/Purple,black
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Brilliant base layer

So comfortable, warm, light...I washed an rewashed them on my ski trip as I didn't want to wear anything else!

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Good baselayer

Great baselayer used for skiing. Only negative easy to pul outs by velcro

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Size up.

These are great but I would recommend sizing up. I am usually a Medium but got the Large and I'm so glad I did.

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Very comfortable and kept us warm during full trip of ours. Excellent product for temperature like -15 also

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Warmth wise I felt it lacks a point otherwise it's good and comfortable. You definitely have to layer it up as it isn't like a warmer.

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International class.

Excellent quality fabric and fitting.

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Best One

Can't say anything more. It's the best thermal, skin fit, warm, cozy and love it's fabric.

Go for it. Best products ever. Decathlon is my fav

Amazing service and support.

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ski base layer - thermal

too expensive !

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Inner Lower

It was bought as a part of a set for my daughter, keeps her warm and with a good fit.

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výborný material

velmi pohodlné

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Pohodlné, jen jako vždy moc pevné v pase. Ale to je asi u všeho :-(

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spodní lyžařské kalhoty - super

jsem s výrobkem a vůbec se vším všudy od A až do Z spokojená. Libuška

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Prijemne a teple

Jako spodni vrstva perfektni, jen by mohly mit sirsi gumu v pase :)

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odpovidajici vyrobek

Kalhoty jsou funkcni, z prijemneho materialu. Rekla bych, ze ale maji bud prilis nizky rozkrok, nebo ultra vysoka zada. Kdyz si je oblecu poradne, mam vrchni lem az pod prsy (merim 165 cm, uvedomuji si, ze to muze zapricinit mensi postava). Ale zase se urcite nestane, ze byste mely hola zada.

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Size Guide

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Additional Product Information


Main fabric: 97.0% Polyamide, 3.0% Elastane

What type of fit is the bl 580 i-soft ski base layer?

The BL 580 I-Soft thermal base layer comes in a SLIM fit. They stop below the knee to avoid overlapping layers (socks + base layer) creating folds in the ski boot, which may affect your comfort. They are like a second skin that hugs the body, which reduces rubbing and improves moisture wicking.

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 fibre manages moisture very well and provides good temperature regulation.These specially textured super-soft yarns give fabrics a silky, natural feel. Ideal for tight, seamless clothing.

What is i-soft technology?

I-soft technology increases the performance of the fabric through different benefits: soft, feeling of warmth and comfort for the skin. It increases the performance of the clothing thanks to better thermoregulation, damp absorption and thermal insulation. To achieve this softness, the base layer is brushed.

What is i-band technology?

I-Band technology is an innovation on the waistband of the I-Soft top and bottom base layers. It enables the fabric to always be positioned properly so that it does not ride up or fall down when skiing.

Technical structure of the product

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

A product-specific environmental rating

The environmental impact of the product is calculated over its entire life cycle 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, trousers, backpacks, etc.)

This product is repairable.

We commit to repairing your product free of charge for the duration of the warranty. Whatever it is, fixings, seams, zips, etc. This service is offered in your usual store. However, if we can't repair your product (production defect), we will exchange it or reimburse you.

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 find in real-life use (snow, cold, powder snow, etc.) The design teams ensure that the programme 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


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