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Key feature
2-way zip with full-length opening for fitting crampons or skis Durable, waterproof and breathable fabric, preformed knees, reinforced lower trouser leg tightens.
Users reviews
4.05 / 5 55 ratings

Products benefits

Freedom of movement
Pleated insert, preformed knees, adjustable waistband
fabric weight = 147 g/sqm, reinforced lower leg patch component
Fabric is waterproof up to 30,000 mm water pressure before washing
Breathable membrane (9<RET<12), with option to ventilate thanks to two-way zip.
Easy dressing
2-way zip with full-length opening for fitting crampons or skis to feet
Water repellent
Water repellent fabric after 5 washes
Pockets are accessible when wearing a harness
Ease of use
2 zipped pockets, lower trouser leg adjusts / tightens, and elastic waistband


from 34" to 40"
Total weight
560 g in size 36"
Main fabric : 100.0% Polyamide Pocket : 100.0% Polyester (PES) Yoke (General) : 100.0% Polyester (PES) Coating : 100.0% Polyurethane (PU)
Approved by
team SIMOND mountaineers during numerous ascents. Especially in ice gullied (ex: Goulotte Rébuffat / Tour Ronde / Chamonix)
Designed to :
mountaineers looking for protection in harsh weather conditions (water / wind)
2 years

Additional information

Elasticated waistband is adjustable on either side. Flat elasticated waistband that's compatible with wearing a harness. Preformed knees, crampon tear resistant lower leg reinforcement. Elasticated and adjustable lower trouser leg drawcord Two zip pockets. Front zip flies. The full-length 2-way zip opens from the top, letting you to fit crampons or skis, and allows you to relieve yourself without having to remove Hardshell pants.
Straight leg cut Product measurements in size 12: Waist measurement: 111 cm Crotch length: 84 cm
Fabric waterproofing
We measure a fabric's resistance to a water column, in mm (based on the ISO 811 standard). The higher the water pressure resistance, the more waterproof the fabric. Components with 2,000 mm rating can resist 2,000 mm of water pressure (which is roughly equivalent to a rain shower lasting 2 hours). With a waterproofing rate over 30 000 mm, the Alpinism hardshell pants offer an extremely high level of waterproofing.
Product's waterproofing
The overtrousers have been approved in a shower test under 100 litres of water / sqm / hour during 3 hours. This test reproduces the conditions of a heavy mountain downpour.
Fabric breathability
To find out whether a fabric is breathable, we test its evaporate resistance or RET (based on the ISO 11092 standard). The lower the fabric's resistance, the more moisture, generated by an active body, is evaporated, and therefore the higher the fabric's breathability. We consider that if - RET < 9 = highly breathable fabric - 9<RET<12 = breathable fabric - RET > 12 = slightly or not breathable fabric. The pants have a RET between 9<RET<12
Product's breathability
On top the main fabric's breathability, these pants have been designed with 2 side zips, enabling air flow that helps to regulate temperature, further enhancing ventilation
full-length two-way zip
The new-generation double zip offers the same waterproofing as classic silicone zips (similar to the pocket zips) while being more flexible, which improves compression of the overtrousers when packed away. Plus, this zip is easier to handle, which helps to make it longer lasting. The 2-way zip and full-length opening, allow you to fit or remove trousers, crampons, skis, which is an added bonus during a storm.

Users reviews

4.05 / 5 55 ratings
46 users recommended this product

At Decathlon, reviews are reliable.

  • Man
    30-39 years old
    23 September 2019
    Use since 2 to 8 weeks
    That review has been deposited on this product version

    I have one of these.. Used them 3 week back on a trekking trail..perfect fit and sturdy product, Just wanted ti know how do i wash them!

  • 01 February 2019
    Use since 2 to 8 weeks
    That review has been deposited on this product version

    Tested these is horrendous conditions in the lakes over the winter and they were perfect easy to get on and off and comfortable to wear highly recommend for keeping out wind and rain

  • 18 October 2018
    Use since 3 to 6 months
    That review has been deposited on this product version
    Winter trousers

    Good fit and sturdy with reinforcement sections. Full length zips are very useful. These are definitely a winter product, they become a bit sweaty in warmer climates