Delta INS Shell
€399Choose freedom to move.
- Barrier CT Pro™ 3-layer waterproof fabric
- 80g Sorona® insulation
- Pit zips to let heat out on the move
- 5 pockets for everyday carry
Colour · Dark Grey · Mud Green · Black · Dark Blue · Dark Green · Olive
Find your winter jacket
Warmth for wherever
winter takes you.
Insulated and fully waterproof, for winters that are wet, not just cold. Warm on the morning commute, dry on the ride home.
Free EU shipping over €100
21-day EU returns
3-year warranty
Find your winter jacket
Pick your cover.
Delta INS and Parka: same warmth, same waterproof fabric. Want freedom to move? Choose Delta INS. Want more cover on the bike and in the cold? Choose the longer Parka. Cold but dry? Choose the lighter Mountain INS.
Delta INS Parka
€449Choose more cover.
- Barrier CT Pro™ 3-layer waterproof fabric
- 80g Sorona® insulation
- Longer cut for more cover on the bike
- Knitted inner cuffs to keep cold out
Colour · Navy · Dark Grey · Mud Green
Mountain INS Hooded
€179€179€179€125€125€125Choose light warmth for dry, cold days.
- 80g Sorona® insulation
- Windproof, water-resistant fabric
- Insulated hood and 4 pockets
- 560 g: wear alone or under a shell
Colour · Black · Dark Blue · Dark Green · Mid Grey · Olive · Burned Orange
Proof, not promises
Don't take our word for it.
Tested in the field. Measured independently. Evidence you can explore.
4.8/5 from 2,800+ customer reviews
Field tested
Five days in the Scottish Highlands.
Before launch, experienced hikers and outdoor professionals put our jackets to work in real conditions. Their feedback helps us refine the fit, features and finishing.
Ned Helyar · Hiking expert
- Six-hour hikes
- Heavy rain and wind
- Temperatures of 4–8°C
Barrier CT Pro™
Twice the industry standard for waterproofness.
Developed by Cortazu. Tested by an independent laboratory.
- Exceptional waterproof protection. Independently tested to 61,200+ mm.
- Breathable comfort. Helps moisture vapour escape as you move.
- The proof is public. Full laboratory reports and test methods, ready for you to check.
Nine years of refining designs. For days like these.
From the fit to the finishing, we refine our designs around the things you do in the outdoors. Discover the details.
A helmet-compatible hood you can adjust when the wind picks up.
Open the underarm zips for extra airflow during more high-intensity adventures or warmer days.
80g Sorona® insulation adds warmth inside the Delta. Open the underarm vents when you need extra airflow.
Pairs well with
1 / 4
Rain pants
Aero Rain Pants
€119Light, packable rain pants to pull over your trousers on wet commutes and winter walks.
Colour · Black
Fleece
AR Fleece
€89Your extra warm layer. Wear it under your jacket on the coldest days, or on its own when it is dry.
Colour · Black
Hooded fleece
AR Fleece Hooded
€89A warm fleece with a hood for cold mornings, travel and days off. Wear it under your jacket or on its own.
Colour · Black
Beanie
Beanie
€39A soft knit beanie that keeps you warm without the bulk. It fits under a hood and packs down small.
Colour · Black
See all winter jackets.
Explore more insulated jackets and women’s styles.
PROTECTION WITHOUT COMPROMISE.
Our most protective waterproof fabric: Barrier CT Pro™. Waterproof, breathable fabric developed to our specifications and tested by an independent laboratory.
A few useful answers.
Which jacket to choose, how to find your size, and how you know it keeps you dry.
Delta INS, Parka or Mountain INS: which is right for me?
Delta INS, Parka or Mountain INS: which is right for me?
Choose Delta INS for a shorter, insulated waterproof jacket. Choose Parka for waterproof protection with a longer cut and extra coverage. Choose Mountain INS Hooded for a lighter insulated jacket for cold, mainly dry days. You can also wear it under a waterproof shell.
What size should I order, and what if it doesn't fit?
What size should I order, and what if it doesn't fit?
Every product page shows the model's height and the size they wear, so you can compare against your own height. All our jackets are a regular fit with room to layer underneath. If it doesn't feel right, you have 21 days to return or exchange it in the EU. Or try it on first in our Amsterdam store at Bilderdijkstraat 136H.
Are all 3 jackets waterproof?
Are all 3 jackets waterproof?
Delta INS and Parka are waterproof, with taped seams for protection against rain. Mountain INS Hooded is water-resistant: it handles light showers, but you’ll need a waterproof shell over it for prolonged rain.
Why is Cortazu cheaper than the big outdoor brands?
Why is Cortazu cheaper than the big outdoor brands?
We sell mainly direct, and we don't pay a licence fee for a branded membrane. That leaves out a large part of what usually goes into the price of a technical jacket. What you pay for is the jacket itself, backed by a 3-year warranty and a repair service if it ever needs one.
