/ Duck & Goose Down - How Much Difference In Warmth?
I dont doubt thats true but what I would like to know, is the difference a really 'marked' difference, 'significant' might be a better word. I mean is the warmth factor something we would notice if no one told us which down was used or is it just a sort 'barely' noticeable difference in the warmth factor? or is something anyone would know quite quick on a cold day?
On the other hand, poor quality White Goose Down will have smaller Down. It will not loft up, and has a rather low warmth-to-weight ratio. Even if there is more of this down by weight, it won't be as warm. Down from younger birds not only tends to have poor filling power, it will also tend to collapse in a relatively short time, because its fibers are too fragile. This is usually the difference between an inexpensive goose down product, and an expensive one."
Thats very informative iksander - but are the differences so pronounced that we would actually 'feel' 'quite' difference in warmth?
> Thats very informative iksander - but are the differences so pronounced that we would actually 'feel' 'quite' difference in warmth?
For a given weight it's a possible yes.
500 is 500 (as long as its the same test, check EU or US tested, and to confuse further some companies state EU down which is US tested), and as long as it has the same fill weight its equal.
Also if you are not worried about weight, then a lower fill power of a higher fill weight will be cheaper and equally warm
you need to know fill power and fill weight of any down items you want to compare
A big difference, in my experience. I've got a goose down jacket. I's my fourth down jacket. It's thinner than the others, and yet the warmest.
Where does eiderdown fit into all this? It's got a fill power of about 700 (it's a myth that it's any higher) but is - again - reputedly warmer than goose or duck down. Why's that then? OOh, big questions...
The other massive influence on warmth is fit and design, which so many people forget. We wear clothes not fabrics and I'd rather wear a well-fitting jacket filled with marshmallows than an eiderdown one sized for a hippo.
I recently wrote some stuff about down on my blog (link is above (thanks Charlie!)) but didn't cover quite a lot of the above as it's currently a bit of an unknown factor and so little research has been done on it.
This is a scientific study
also crucially with down, it has to loft correctly so correct amount of down in each correctly designed baffle
my thing with all these narrow baffle jkts at the moment is there isnt much down in the baffle and it cant loft properly, plus all the stitch lines make wind whistle through taking heat away.. i will stick with primaloft or similar at that temperature and save down for when its proper cold
It's obviously just a fashion thing mainly now http://instagram.com/p/fDpjiMrvB9/ ;-) but I thought originally it was about very light jackets with actually very little down in them, and the narrow baffles stop the down from sinking to the bottom of bigger compartments?
That's fair. It's actually noticeable in very cold conditions when you are wear a stitch through jacket in comparison to box wall.
Elsewhere on the site
Pete Whittaker has flashed the 32 pitch route Freerider 5.12d on El Capitan in Yosemite Valley over three days,... Read more
Manchester Climbing Centre is showing Reel Rock’s Valley Uprising on Tuesday the 11th of November at... Read more
From a personal point of view, photographing the night sky is one of the most difficult, frustrating yet ultimately rewarding... Read more
A pack designed for year-round ascents. Super light, flexible, strippable and seasonally versatile you can rely on this perennial... Read more
Nuts, wires, stoppers, chocks, wedges, whatever you want to call them, have been around for a long time. Initially made from... Read more