A fabric's resistance is measured using water pressure expressed in terms of the height of a water column in mm (test based on ISO 811). The higher the pressure, the more waterproof the fabric. Components with a 2,000 mm rating can withstand the pressure of a 2,000 mm column of water (which is equivalent to a rain shower lasting 2 hours). Waterproof rating is expressed in Schmerbers (for example: 2,000 Schmerbers).

To find out whether a fabric is breathable, we test its evaporative resistance or RET (based on the ISO 11092 standard). The lower the fabric's resistance, the more water vapour generated by physical activity can escape and the higher the fabric's breathability. For example: RET < 9 = extremely breathable fabric / 9 < RET < 12 = very breathable fabric / 12 < RET < 20 = breathable fabric / RET > 20 = little or no breathability.

Abrasion and friction resistance test: for example, we carry out laboratory tests to check that the fleeces do not pill. Colour fastness test: we check colour fastness to ensure that colours do not bleed when coming into contact with saliva. Ageing test: repeated washing must not alter the fabric's original properties, including its shape, thickness or appearance.

Elasticated cuffs. Net inner lining, ventilated back. Media pocket with headphone feed.

The product's environmental impact is calculated over its entire lifespan, using various indicators. An overall score is assigned from A to E to help easily identify the most eco-friendly products by comparing products of the same type (T-shirts, trousers, backpacks etc). Decathlon is committed to displaying environmental information about its products. For more information: http://sustainability.decathlon.com/

1/ Machine wash (30 to 40°C): close rip-tap fastenings, gentle detergent .Wash jackets and trousers inside out. Loosen straps and elastics. 2/ Avoid folding garment excessively in machine: this can damage it. 3/ Do not mix different types of clothes or colours. 4/ Do not use bleach. 5/ Rinse thoroughly followed by a gentle spin cycle. 6/ Drying option: Either line or tumble dry (low temperature, short cycle).

The product's environmental impact is calculated over its entire life cycle 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.) with each other. Decathlon is committed to displaying the environmental information of its products. For more information: http://sustainability.decathlon.com/