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Showing 1 of 8 conversations about:
Terra Nova Bivy Bags
Jae9
5
Mar 22, 2017
Is there an R value or temp rating for these?
randy.e.lee
9
Mar 22, 2017
Jae9Theyre bivvy bags, not sleeping bags. They're not insulation, theyre wind/rain/sharp rocks protection for a sleeping bag. So no R value or temp rating. Throw a 50 degree bag in or a 0 degree bag, and use that rating.
Jae9
5
Mar 22, 2017
randy.e.leeOooh thanks Randy!
Creamytorr
21
Mar 22, 2017
Jae9Actually an interesting ?
if the survival bag compresses the down reducing loft as everyone knows the sleep bag loses efficiency and the rating will go down.
if the sleeping bag is at maximum loft and the survival bag sits loose on the sleeping bag that will increase insulation and certainly will be worth some extra degrees.
good luck
Jae9
5
Mar 22, 2017
CreamytorrVery true! I did a little research and found that they typically add about 10° to your bag rating by trapping in air.
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