Why choose a waterproof jacket with a hardshell membrane?
Against mountain rain, wind and cold, a waterproof jacket with a hardshell membrane is the ultimate protective layer. Unlike a simple water-repellent windproof jacket, a hardshell jacket combines a technical membrane, sealed seams and a water-repellent treatment to block water while wicking away sweat. The result: you stay dry in a shower or a downpour, with no sauna effect during exertion. It's the essential third layer for hikers, trail runners and mountaineers — slip it into your pack the moment the sky turns grey. Worn over a breathable base layer and a fleece, it completes an effective layering system in all conditions.
Waterproof jacket vs rain jacket: what level of protection do you need?
"Waterproof jacket" and "rain jacket" meet the same need — staying dry — but differ in their level of technical performance. A rain jacket protects against everyday showers, while a waterproof hardshell jacket takes on prolonged bad weather in the mountains. When comparing two models, a few key criteria make the difference:
- membrane waterproofing against heavy rain
- Breathability to wick away sweat
- Sealed seams and water-repellent zips
- Adjustable, helmet-compatible hood
- Weight and packability
The Ultrashell membrane: waterproofing and breathability combined
Our most technical models are built around the membrane Ultrashell, developed in-house to balance waterproofing and breathability. Combined with a 3-layer construction, it blocks water and wind while allowing moisture from exertion to escape. Seams are heat-sealed and zips are waterproof — two common entry points for water — to ensure continuous protection. A DWR water-repellent treatment completes the package: water beads and runs off the fabric surface instead of soaking in. With regular care, this water-repellency can be reactivated, extending the life of your jacket. Depending on the model, the cut favours either lightness for long-distance travel or robustness for the most demanding conditions.
Waterproof hiking, trail or mountaineering jacket: which model?
Every Cimalp hardshell jacket is designed around a specific activity. For hiking and trekking, go for a waterproof jacket protective and comfortable over time. For trail running, a lightweight, packable model disappears in your pack. For mountaineering, the priority is durability and a helmet-compatible hood. The range is then broken down by fit for everyone — find the dedicated models in our collections men's hardshell jackets and women's waterproof jackets.
A waterproof jacket for urban cycling and everyday life too
Beyond the trails, a waterproof breathable jacket also works in the city and on a bike, protecting against showers without making you sweat. Its lightweight design and hood make it a reliable companion for commutes and weekend outings alike. To complete your protection against rain and cold, pair it with a softshell jacket or a fleece by season. Browse all our Cimalp hardshell waterproof jackets to stay dry whatever the conditions.