Doubling up sleeping bags

[sodak]

I've stuffed my issued light sleeping bag into the heavy one numerous times in the army. Comfort level was ok in 0 degree nights.

 

[boom]

I have. 20 Kifaru. Draped my bros extra cheapy north face (unknown temp rating) bag over myself like a quilt and was warm. It was cold! Maybe five degrees.

 

[Hackleback]

Might be best to unzip the outer bag, except for the foot box, stick your feet in it and just use like a quilt. Putting one bag inside another maybe restricting and compress the fill, reducing the insulative values.

 

[marc]

I have done this with a down bag and down quilt over it and it worked great. Also the current army sleep system is 2 bags and a bivy all sized to work together and it works well for how cheap it is.

 

[mrbillbrown]

Hope that doubling up works ok. I plan on using my mtn serape over my SD backcountry bed if I get too cold.

 

[gmajor]

I just picked up a new Patagonia down jacket (http://www.patagonia.com/us/product/mens-down-sweater-jacket?p=84674-) for $91 including tax! Pretty excited about that deal. The outlet near reno was having 40% off the already heavily discounted prices. I also got some rio azul waders for $100.

Anyway, for those of you that sleep in a down jacket with your quilt, how much warmth does it add? Degree estimate? I've occaisionally slept in my fleece + down vest, and it's added significant warmth, but the jacket is sooo much warmer than the vest, I'm wondering how low I could comfortably get my 20 degree quilt...

 

[_Nick_]

I just picked up a new Patagonia down jacket (http://www.patagonia.com/us/product/mens-down-sweater-jacket?p=84674-) for $91 including tax! Pretty excited about that deal. The outlet near reno was having 40% off the already heavily discounted prices. I also got some rio azul waders for $100.

Anyway, for those of you that sleep in a down jacket with your quilt, how much warmth does it add? Degree estimate? I've occaisionally slept in my fleece + down vest, and it's added significant warmth, but the jacket is sooo much warmer than the vest, I'm wondering how low I could comfortably get my 20 degree quilt...

I would actually recommend not sleeping with the jacket on, but instead taking it off and using it as a blanket for your core (or your legs if they tend to get colder). If you sleep with it on, whatever side you're laying on will compress the down, rendering that portion of the insulation much less effective. I've found using my down jacket as a blanket keeps me notably warmer than wearing it.

That said, wearing my jacket seemed to add about 5 degrees to my comfort level. Using it as a blanket adds closer to 10. This is for my Montbell UL Down jacket; your Patagonia appears that it will be a bit warmer.