Women's High-Tech Cross-country Skiing Upper Undergarment XC S UW 900 - Blue


Our team has developed this technical base layer for regular cross-country skiing at average intensity.

Thanks to its "seamless" design with fewer seams, the 900 base layer is like a second skin. It offers optimum comfort and good temperature regulation.

Color: Galaxy blue / Bright indigo
Size: size guide


Product benefits


Good regulation of your body temperature for optimum comfort.


Component that quickly eliminates moisture.

Freedom of movement

"Seamless" technology with fewer seams providing excellent comfort.

Easy maintenance

The synthetic material is machine washable and does not require ironing.


132 g in size L

Technical information


Very close fitting "Athletic" cut.
If you’re looking for a second skin effect (skin-tight), choose your usual size.
If you’re looking for a looser fit, choose one size up from your usual size.


This high-tech base layer is a knit composed of polyester and polyamide yarn for good moisture management, and elastane fibres for elasticity.
This smart knit combined with the "seamless" technology (i.e. fewer seams) provides excellent freedom of movement and comfort.

How to stay warm and dry during my cross-country skiing outings?

Follow the 3-layer technique.
layer 1: second skin (high-tech base layer) that transfers moisture away from the body and keeps your skin dry.
layer 2: insulating (t-shirt, fleece) layer that provides warmth and wicks away moisture outwards.
layer 3: outer protective (jacket) layer that protects from the weather conditions: wind, snow and cold.
Adjust the number of layers to the level of your physical effort and the weather, and make sure that the clothing is breathable.

A score for comparing products' environmental impact

The environmental impact of the product is calculated over its entire life cycle and using various indicators. An overall ABCDE score is given to help you easily identify products with the best environmental performance by comparing products of the same type (t-shirts, trousers, backpacks, etc.).
Decathlon is committed to displaying the environmental information of its products.
For more information: http://sustainability.decathlon.com/


2 years

Product concept & technology

Product Composition

Main fabric 71% Polyester, 20% Polyamide, 9% Elasthane


Keep on a hanger or folded in a clean, dry place.

User Directions

Not designed to be worn directly with a backpack.


All of our products are tested in the field under real conditions by our panel of testers made up of professional instructors and coaches as well as regular cross-country skiers.Our clothes are also subjected to laboratory tests: colour running, washing, stain resistance, yellowing.

Maintenance advice

Machine wash - 40° max - gentle

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean


Women's High-Tech Cross-country Skiing Upper Undergarment XC S UW 900 - Blue
Women's High-Tech Cross-country Skiing Upper Undergarment XC S UW 900 - Blue

Customer reviews


Environmental Impact

The carbon footprint of this product is:
7.87 kg CO2e
1 kg of CO2e represents 5km in a petrol car (according to the Base Carbone© of ADEME)
What's the carbon footprint ? We evaluate the environmental impact of all our products. At all stages of their life cycle: from the extraction of the raw material, passing through transport to the plant which transforms them, the transformation, the manufacture, the transport of the finished product, until its use and end of life. Find out more
The environmental note of this product is: C
What is the environmental note? Overall environmental score for this product in comparison to others in the same category. It is calculated based on its impact on the environment (air and water emissions, greenhouse gas emissions, depletion of natural resources) at each stage of its life cycle, according to a system managed by ADEME. Find out more