Before you buy an army sleeping bag, you have probably asked the question of criteria for choosing a good sleeping bag or down jacket? We try to answer them…
Qu’Appelle you one fluff?
On waterfowl (land birds are not fluff), the down is the fluffy, fluffy layer that insulates them from the cold. There are two kinds: the goose or duck down.
The down like a snowflake 3D imprisoning thousands of air pockets. The down a insulating 2 times higher than the best synthetic insulation.
Why the down brings as much warmth and comfort?
Everything is based on the air! Air is a very poor conductor of heat. The duvet has a three dimensional structure that traps an incredible volume of air and forms a pocket of still air around you. The body heat can not escape and you completely isolated from the outside cold. The incomparable swelling of down also makes it extremely comfortable and enjoyable.
Military use of down sleeping bag is a real asset of Pimasleepingbags: it is the most compressible insulation that exists! Moreover it is light and its life is important.
On an old goose down, it is in a duvet ounce over 2 million fluffy filaments that interlock to form the still air layer. For comparison the best synthetic insulation reaches maximum 400 cu.
Are there a difference between duvets?
The best down comes from larger and older birds. The down must come from breeding where the birds is the time to mature. It is in the foie gras-producing countries found the best down: France, Czech Republic, Poland, Hungary …
Countries such as China, producer of animals for meat (or even practicing plumage of live animals …) produce only small animals. The duvet is very average. Moreover, it is not always easy to control.
A same size and maturity, goose down is always better than duck down. Indeed, the quality of goose down is better than duck down (except the Eider) several hundred cu. The goose was bigger than a duck, off, plus a water bird, the greater its down has good thermal performance.
The down young animals have a life much less, flatten more quickly, and will have less swelling.
How we measure quality you down?
Cuin: measuring the force of resistance to the pressure of down under a defined weight which represents the stress of the fabric. Which ultimately gives the swelling of fluff, fluff filling capacity.
The filling capacity is given by the number of “inch cube” (Cubic Inch or Cu.in) that “one ounce” of filled duvet. (1 ounce = 28,35g / 1 liter = 61 cubic inch / 1-inch cube = 0,016L or 1.64 cl)
To measure the filling capacity using test tubes, in which use is 1 ounce of fluff. then placed a disc of a predefined weight (representing the weight of the fabric carried on down). The height in the tube thus obtained gives the swelling down, measured in “cubic inch”, often labeled “cu.in” or “cu”.Results are obtained following duvets 300 cu 800 cu.
The best down to a value of 800 cu. One can find on the market 850, see the 900 cu, but the difference with the 800 cu is limited and further increases the price of the final product.
Worldwide, there are two methods of measuring cuin for down: the American approach and the European method.
The American method uses a tube of smaller diameter, and a disk representing the weight of the lighter fabric. The results are improved with the American method. result of the difference is estimated at about 100 cu between the US and the European method. A cuin equal on paper, it is necessary to remove about 100 cu in the US result.
At Nordic Adventure all cuin are given based on the European standard, allowing you easier comparison between products.
Proportion down / feather: the other parameter to consider is the percentage between the down and feather. For example, a 95/5 has Down 95% down and 5% feather.
95/5 is the best proportion, because we can not fill a sleeping bag with 100% down. The feather can give cohesion to the filling and standardize the duvet in the bag compartment or your jacket. In the “high end” products you will find levels up to 90/10, 95/5, 96/4.
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