Made for Our hiker-designers have eco-designed these NH500 Imper waterproof over-trousers for your hikes on lowlands or on the coast. An added bonus in case of rain! Slipped into the bottom of the bag, these hiking over-trousers offer full protection in case of rain and match the waterproof jacket! A waterproof, compact & breathable model.
This garment has been validated in a shower test under 60 litres of water/sqm/hour for 2 hours. This test replicates the average conditions of a rain shower.
The fabric of these overtrousers has water-repellent properties: it lets water slide over its surface without seeping in. As a result, the fabric does not soak up the water and remains lightweight and breathable. A fabric becomes water repellent by applying a treatment to its outer surface. We have also taped ALL of the seams.
How to ensure your overtrousers stay waterproof over time
In order to maintain good water-resistance over time, the fabric's water repellent properties must be regularly reactivated. We recommend doing this every three washes or after a dozen uses in the rain. The waterproof property can be easily restored by heating the fabric: in a tumble dryer or with a hairdryer for a relatively short period. If you are washing it, it must be thoroughly rinsed.
Waterproof rating expressed in mm or Schmerber
We measure the resistance of a fabric to water pressure expressed in mm of water column (test based on Standard ISO 811). The higher the water pressure, the more waterproof the fabric. A component with a 2000 mm waterproof rating can therefore withstand the pressure of a 2000 mm column of water.
To find out whether a fabric is breathable, we measure its thermal evaporative resistance coefficient (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.
- RET < 9 = extremely breathable fabric
- 9 < RET < 12 = very breathable fabric
- 12 < RET < 20 = breathable fabric
- RET > 20 = little or no breathability
A score for comparing products' environmental impact
On a scale of A to E, this jacket obtained a B rating.
Our products' environmental impact is calculated over their entire life cycle. A rating from A to E is given to help you easily identify products with the best environmental performance by comparing and contrasting products of the same type (T-shirts, trousers, backpacks).
Decathlon is committed to displaying the environmental data of its products.
For more information, go to: https://youtu.be/8t63KkRwn_8
Working towards more environmentally-friendly dyes
Our teams work to find innovative processes that reduce water consumption or water pollution during the production process. The "dope dying" (bulk dying) process saves up to 60% of water and significantly reduces the amount of CO2 emitted. This also reduces colour fading in the garment over time. As of 2019, we are now using this new procedure on these over-trousers.
How to choose your waterproof overtrousers based on your outings and level of exertion?
During a sporting activity, you perspires to varying degrees, depending on the intensity or length of the effort. If the fabric's breathability is not suited to the type of activity/exercise, your perspiration will condense inside the jacket. You feel damp inside: this isn't rain getting through, but condensation from sweat. You therefore need to choose over-trousers in line with your activity type. This product is designed for 2-hour hikes at no more than 5km/h.
Our hiking overtrousers are guaranteed for 2 years.
Our commitment? To offer you long-lasting products that you can use on all your country hikes and walks. Because the products we love the most are those that have a story behind them... and plenty of life in them yet!
It is important to always make sure that the trousers completely dry before putting them away.
Our design team conceives, designs and creates Quechua products in France, at the foot of Mont Blanc. We test them in the laboratory and in the field with other hikers to make sure that they are comfortable and waterproof. Whether it is in forests, on the coast or in the countryside in fine or rainy weather, we cover as many different trails as possible. This creates plenty of opportunities for discussions to get your feedback which is used to plan our future products.