I was in my local REI an felt the weight of a sleeping bag with hydrophobic down and it felt heavier. Does any one know what the weight penalty is compared to untreated down?
S
I was in my local REI an felt the weight of a sleeping bag with hydrophobic down and it felt heavier. Does any one know what the weight penalty is compared to untreated down?
S
"The wise man questions others wisdom because he questions his own, the foolish man because it is different from his own." Leo Stein
Great questions, there is no discernible weight penalty for treated down, 1 oz of 850 untreated down or 1 oz of 850 treated down will both yeild 850 cubic inch of loft under ideal conditions. No disrespect, and I appreciate your observation but without two piece of equipment side by side at REI that are the exact same model/size with the only difference being fill type you'd be hard pressed to make that judgement without a scale. To many variables are at play even in the same model, tolerance stacking can result in a weight difference in just the fill amounts. If one bag each chamber is filled on the low end of the tolerance of the manufacturer and the other bag is fill on the upper end of the tolerance you may end up with quite a difference. All of these contribute to what you may have observed and in no means reflects a weight penalty for carrying a treated down versus untreated.
I hope that answers your question and again no offense meant...
Last edited by sr1355; 10-25-2012 at 09:28.
This is a great thread. I'll be in the market for a winter topquilt in the near future, and have been considering the treated down.
Cheers
Moisture would only accumulate below freezing, right?
Mike
Mositure vapor can be expereinced in any temp range given right conditions, i.e. temp, humidity, fog, mist, etc... In cold, winter conditions, the moisture vapor can condense in the down at what is call the dew point. At a point inside a quilt where the temp is a the dew point the moisture vapor can condense into liquid form on the insulation regardless of insulation type. This temp will vary with outside temps, humidity levels, etc... In my former career we using vapor barrier to prevent mositure migration into building assemblies so a vapor barrier between the quilt and you would be an effective solution for winter conditions to protect your insulation of choice.
http://www.youtube.com/watch?v=j96yFJP0FzI outdoor gear lab tested the sierra designs dri down...kind of intresting although i dont think that is how they meant for them to use it.
Amazing. The most misguided gear test I've ever seen.
Thanks for the link PackBacker. At least now I know I should probably never waste my time looking at the gear reviews by Outdoor Gear Labs. Do they, by any chance, have any videos where their gear testers pitch a hammock on the ground like a tent to see how comfortable hammock camping is?
Cheers,
- Martin
Last edited by PineMartyn; 10-25-2012 at 15:00. Reason: typo correction
No one has ever been heard to say on a deathbed, "I wish I'd put in more time at the office."
LOL i dont think so but it wouldnt surprise me if they did
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