What is the difference between water-repellent and waterproof trousers?

A water-repellent trouser lets drops slide off and resists light rain, but falls short in heavy downpours. A waterproof trouser (like this model) features a membrane and sealed seams that block water entirely, even in sustained heavy rain.

How do I wash and care for my waterproof trousers with a membrane?

Machine wash at 30°C with the zips closed, using a specialist detergent (such as NIKWAX or NST) and no fabric softener. Opt for a gentle spin cycle (400 rpm max) and air dry. To restore the water-repellent finish (DWR), apply a re-waterproofing spray regularly after washing.

What are the delivery times for this product?

If you place your order before 1 pm (excluding weekends), it will be dispatched the same day. Allow 2 to 4 working days for home delivery or collection point delivery within mainland France.

Can I return the item if the size doesn't fit?

Yes, absolutely. You have 30 days to return it and get a refund or an exchange. Return shipping is free. The item must be new, unworn, unwashed, and have its original tag.

STORM PRO PANT 3 H - Waterproof over-trousers

129,90 €

33 reviews

Black

Delivered between 14 - 19 Oct.

Free returns within 30 days

Free repairs for life

A repaired garment is a story extended. We ensure the longevity of your Cimalp equipment, season after season.

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Ultrashell® 3-layer waterproof-breathable trail jacket - Men's

189,90 €

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Stretch thermal jacket, breathable - Trail & Running - Men

84,90 €

STORM PRO PANT

129,90 €

33 reviews

Delivered between 14 - 19 Oct.

Free returns within 30 days

Who did we design it for?

For practitioners of trail running, ofultra-trail and other outdoor activities who need reliable overtrousers against rain, wind and challenging conditions.

For long days out, exposed terrain and unstable weather — when you need to stay protected without overheating.

For those looking for a durable protection, a high breathability and trousers that are easy to wear alone or over thermal leggings in winter.

How to wear it?

Wear it over a thermal base layer or technical leggings when temperatures drop.

As an outer layer in wet, windy, or highly changeable conditions, providing effective lower-body protection without hindering your progress.

Cut engineered for protection and layering. We recommend your usual size so it layers comfortably over a base layer without restricting movement.

What makes it different?

Its 20,000 mm Schmerber protection packed into just 300 g. The waterproof-to-weight ratio that makes all the difference when every single gram counts on long-distance efforts.

Its performance

Breathability

80'000 g/m²/24h

Durability

Lightweight fabric

Lightweight

300 g (M)

Warmth

All seasons

Waterproofing

20'000 mm (Schmerber)

Ideal for

Trail running

Hiking

Keep moving when the weather turns.

In the mountains, conditions turn without warning. A sudden squall mid-traverse, gale-force gusts along a ridgeline. Without instant protection, the cold sets in and motion grinds to a halt.

These over-trousers are engineered to maintain your pace when conditions turn. They cut out the wind, lock out the rain, and let your body breathe during high-intensity efforts. The cut moves naturally with every stride, even when pulled on over a full kit.

Because in the mountains, pushing forward whatever the weather makes all the difference. And turning back should never be your only option. Its performance meets the requirements of all trail runs and ultras, including the UTMB®, Diagonale des Fous®, Ut4M®, and more.

Key features

Zipped leg bottoms

- Quick to put on without removing your shoes.

Elasticated waistband

- Stable hold over equipment with no pressure points.

Sealed seams

- Heat-taped seams for a fully waterproof finish.

Compactable

- The trousers pack into their zip pocket.

Waterproof

Breathable

Ultra-light

Waterproof

Breathable

Ultra-light

Waterproof

Breathable

Ultra-light

Waterproof

Breathable

Ultra-light

ULTRASHELL® Technology

Waterproof and breathable protection to tackle demanding mountain conditions.

High waterproofing: high-performance membrane combined with constructions adapted to wet and windy environments.
Optimised breathability: microporous membrane promoting moisture evacuation during exertion.
Windproof protection: limits heat loss and improves comfort in exposed conditions.

Designed for intensive use in the mountains, ULTRASHELL® technology favours built-to-last constructions to ensure a high durability and reliable long-term protection.

Specifications

Weight

300g (M)

Brand

Cimalp

Breathability

Ultra-breathable 80'000g/m²/24h

Wind resistance

Strong wind, 60 to 90 km/h

Waterproofing

20,000mm water column (20,000 Schmerber)

Insulation

ALL SEASONS

Size type

Men's Bottoms

Traceability

Product sheet relating to environmental qualities and characteristics
Manufacturing: China
Weaving/Knitting: China
Dyeing/Printing: China
Releases plastic microfibres into the environment when washed

Reviews

4.7

Based on 33 reviews

5

84%

4

9%

3

0%

2

6%

1

0%

Customers recommend the usual size

Water resistance

Breathability

In summary This content is written by AI

Customers appreciate its protection in rainy, windy and cool weather: worn on the TDS, the Camino del Norte or while cycling, it kept them dry and warm, including one user over 1,000 km. Several also praise its light weight, neat finish, quick pull-on design and practical zips that fit over shoes. It can, however, come up large: check the size guide carefully, especially if you plan to wear it over trousers.

PIERRE.P

Verified customer

Ordered size M Ordered color Noir

Translated review

12/09/2025

Excellent product, lightweight, with very nice finishing. No problem rolling the pants up into the back pocket despite what I've read. I'm taking them on the Diagonale des Fous! The sizing advice is good. I'm 1.75m tall and weigh 66kg, so I wear a size M.

Stéphane.L

Verified customer

Ordered size L Ordered color Noir

Translated review

15/10/2025

I'm 180 cm tall and weigh 77 kg. I initially ordered size L. It was far too big and wide for running, but perfect over my clothes for my quad bike rides. I then reordered the same pants in size M. This time, the size was perfect. They're great for training in rainy, windy, and cool weather.

frederic M.

Verified customer

Height 179cm Usually wears M Ordered size M Ordered color Noir Usage Trail running

Translated review

15/09/2026

Great pants used during the 2026 TDS — I didn’t get cold and stayed dry all night.

Christophe F.

Verified customer

Usage Randonnée

Translated review

13/09/2026

Used on the Camino del Norte, on the Camino de Santiago, 1,000 km from Bordeaux, and it was impeccable. Easy to put on quickly.

Dieter.K

Verified customer

Ordered size L Ordered color Noir

Translated review

23/10/2025

The fit (L) is good but could have a few more centimeters, as you still wear pants underneath. Good quality and fast delivery. Would gladly order again.