Lightweight & packable
You’re viewingBarrier CT Air™
For fast, high-output days in changeable weather.
- Full waterproof protection
- Stays breathable, even this light
- Light and packable
- Independently lab tested
Developed by Cortazu. Independently tested.
Barrier CT Air™ brings together rain protection, breathability, and a lightweight construction built for movement. Below, you can explore the measurements and reports behind the technology, starting with waterproofness.
Barrier CT Air™
Lightweight protection. Built for movement.
Waterproof.
30,000mm
01 / 03 · Protection
Independent labTested by a third-party laboratory to JIS methods. Cortazu does not self-certify.
Field testedWorn in documented conditions by named field testers.
Published in full
The complete reports, not a headline figure. Read the reports
The full lab and field reports will be published on this page.
Choose your protection
Air or Pro?
Start with your day.
Two specifications, two use cases. Choose the construction that fits how you’ll use it.
Robust & protective
Barrier CT Pro™
For sustained exposure and more demanding use.
- Our highest waterproof specification
- Breathable under sustained effort
- Abrasion-resistance standard
- Independently lab tested
Then we gave it to people who'd notice if it failed.
Every Cortazu product is field-tested by specialists before it reaches you.
The full protocol
Lightweight doesn't mean less proven.
Three lab tests and one weight specification, all met at once. A fabric that clears three and misses one doesn't carry the mark. Here is what gets measured, how it's tested, what we require, and what came back.
Waterproof
30,600mm
Required 30,000 Passed
Water repellency
Grade 5
Highest grade Passed
Breathability
16,091g/m²/24h
Required 15,000 Passed
Weight
<300g
Finished product Passed
Waterproofness How well the fabric keeps water from getting through, even in heavy rain. 30,600 mm
Waterproofness
How well the fabric keeps water from getting through, even in heavy rain.
JIS L 1092 · 7.1 Method B
Water pressure is applied to the face of the fabric at 100 kPa/min, distilled water at 20±3°C. We require the test to run until water comes through, not to stop at the pass mark.
30,000 mm H₂O
30,600 mm H₂O
Average of five samples, run until water came through. Lowest: 30,240 mm.
Water repellency How well water beads up and rolls off the outside instead of soaking in. Grade 5
Water repellency
How well water beads up and rolls off the outside instead of soaking in.
JIS L 1092 · 7.2 spray rating
A standardised spray is directed at the treated face fabric and the surface is graded from 1 to 5. On a lighter face fabric this matters more: once it wets out, breathability drops.
Grade 5
Grade 5
All three samples. The highest grade: no wetting, no droplets sticking.
Breathability How well heat and sweat can escape, so you stay comfortable as you move. 16,091 g/m²/24h
Breathability
How well heat and sweat can escape, so you stay comfortable as you move.
JIS L 1099 · Method B-1
Moisture vapour moving from the inside out through the fabric, measured over 24 hours. It shows Air stays breathable while being waterproof and lightweight.
15,000 g/m²/24h
16,091 g/m²/24h
Breathable, while staying waterproof and light.
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