Winter is approaching and is time for a review of one of my favourite down jackets. This is an 850 cuin goose down jacket from a Polish brand named Cumulus. I have used this down jacket for 18+ months now on various occasions. From winter mountaineering activities, as insulation jacket while camping but also for daily use when temperatures drop down in my area.
My personal experience with the Cumulus brand is more than positive and this also includes the amazing lightweight down jacket Cumulus Incredilite Endurance. It uses Pertex Endurance on the outside, making the shell waterproof to a column of 1000mm. Pertex Quantum on the inside. Talking about the inside, I would love to see the inside in Pertex Endurance, because it happened a couple of times when I wore the down jacket while being full of sweat and as expected the goose down lost its insulated property. I know the new Incredilite Endurance model is using Hydrophobic Down, but still, I think the whole jacket should have a better waterproof shell.
Pertex Quantum DWR fabric and filled with Polish 850 cuin white goose down. Designed in cooperation with the group of outdoor enthusiasts connected with fromoutdoor.org.pl.
The down used is from the highly-regarded Polish goose, which is considered the best in the world in terms of the fill power. These down feathers are one of the most important component of Cumulus’ products, because it determines the efficiency of the insulation and provides reliable comfort even in the most hostile conditions. It is this down which affects the quality of the products to the greatest extent.
Waterproof fabric with a thin membrane. Its biggest advantage is the extremely high breathability, compared to a thick membrane. It is an ideal material when you require a higher resistance to condensing moisture without losing the smooth discharge of water vapour from the body to the outside. It is perfect as a top coat of down jackets and sleeping bags, greatly increasing their resistance to water.
It is said that at the ISPO and Friedrichshafen trade fair, about 95% of the products are equipped with YKK zippers with very good reason: these are the most durable zippers.