Made for Our team of passionate mountain trekkers has designed this jacket for walking in cold or windy weather while remaining completely protected Waterproof jacket using the combination of a lightweight, breathable fabric and a sturdy fabric to help protect you from the elements.
Combination of a durable and protective fabric (147g/sqm; 70 denier) on areas to be protected from friction (shoulders, outer arms, front and back hem) and a light and breathable fabric (109 g/sqm; 20 denier) elsewhere.
Back 2 cm longer than the front to ensure maximum protection and to cover the thermal layer 2 underneath if necessary.
Completely adjustable hood height and depth.
Semi-rigid visor with integrated mesh headband to provide a high level of protection and support.
The high stand-up collar effectively protects the lower face.
2 hand pockets that remain accessible even when carrying a backpack and a YKK AquaGuard waterproof zip.
There is a mesh mobile phone pocket inside the right pocket.
Features a waterproof YKK AquaGuard zip along the entire length with an inside flap providing protection from the wind. Folded underflap on the hem to facilitate fastening of the zip.
Double slider allowing opening from the bottom of the jacket.
Soft fabric flap at the top of the collar to protect the chin.
Double tightening with an elastic cord and toggle at the hem.
Velcro-adjustable sleeves covering the wrist.
The gusset on the wrist makes it easy to wear gloves with the jacket.
Water resistance of the fabric
We measure a fabric's resistance to a column of water in mm (based on the ISO 811 standard). The higher the pressure, the more waterproof the fabric.
Here are the waterproofing values of the Trek 500 jacket:
25 000 mm (or 25 000 Schmerber) before washing for the lightest fabric (11 000 mm after 5 washes)
20 000 mm (or 20 000 Schmerber) before washing for the strongest fabric (17 000 mm after 5 washes)
Water resistance of the jacket
The water resistance of the jacket was tested under rainfall of 450 litres of water/sqm/hour for 4 hours. This test reproduces the conditions of a thunderstorm in the mountains.
Breathability of the fabric
To find out if a fabric is breathable, we test its evaporative resistance RET (ISO 11092 standard).The lower the fabric's resistance, the more the water vapour evaporates, & the higher the fabric's breathabilityIt is considered that if:RET < 9 = very breathable fabric * 9 < RET < 12 = breathable fabric.
Here are the breathability values of the Trek 500 jacket:
>Most durable fabric: RET < 12 (or 3621 g/sqm/24h, standard JIS1099A)
>Lightest fabric: RET < 8 (or 2972 g/sqm/24h, standard JIS1099A)
Water repellent properties info
The water-repellent property of a fabric is its ability to let water run off its surface without absorbing it.
This prevents the fabric from soaking up water, and keeps it lightweight and breathable. The fabric is made water repellent by treating its outer surface, however this property may deteriorate with use.
Water repellence can be reactivated by tumble drying the trousers in the dryer for 10 min on low temperature.
You can also use the FORCLAZ re-waterproofing spray (ref 855490)
This jacket has been tested and validated in the field in genuine conditions. It was worn for 5 weeks by several people who undertook the Grande Traversée des Alpes (GTA) in late spring 2017.