The wind makes the perceived temperature drop considerably.
With an outside temperature of 0°C and 20 km/h winds, it will feel like the temperature is -10°C.
The so-called “windproof” components cancel out this uncomfortable wind chill. By creating a barrier against the wind, they are very good at reducing heat loss.

In areas that are sensitive to wind (front and sleeves) the fabric has a windproof membrane; breathability is therefore lower.
Performance is 2839 g/sqm/24h (according to standard JIS 1099 A).
On the back and sides, the fabric does not have a membrane, to improve breathability.
Performance is 3219 g/sqm/24h (according to standard JIS 1099 A).

The water repellent property of a fabric is its capacity to make water run off its surface without absorbing it.
This prevents the fabric from soaking up water, and keeps it lightweight and breathable. The fabric is made water repellent by treating its outer surface, however this property may deteriorate with use.
In order to reactivate it, follow the guide:
https://www.quechua.fr/conseils/comment-reactiver-la-deperlance-de-sa-veste-a_86425

Waterproofing spray for leather and textiles.
https://www.decathlon.fr/bombe-re-impermeabilisant-id_5954981.html
Regenerates the water-repellency of the fabric and optimises the performance of your garment throughout its lifespan.

The product's environmental impact is calculated over its entire life cycle using different indicators.
An overall rating from A to E is provided to help you easily identify the more eco-friendly products by comparing products of the same type (T-shirts, trousers and backpacks, etc.)
Decathlon is committed to displaying the environmental information of its products.
For more info: http://sustainability.decathlon.com/