Before I owned proper subzero quilts I was able to get my 20F quilts to +5F using insulated pants and down coat to sleep in.
These items were also used around camp in the evening so they were duel purpose.
Although these items are a bit oversized for your situation finding thinner overpants and a light down jacket with hood might solve your problem.
If the weight is worth the warmth I think I would be able to tolerate up to 1 lb. The bulk however not so much. The compact size of the SOL bivvy is what turned me on to it. Some other type of bag liner could be a good option, it just has to fit in my pack! The sea to summit thermolite mummy claims to add 25 degrees F of warmth and weighs 14 oz.
I may invest in a golite down jacket, they are on clearance and wouldn't add too much weight but would be handy around camp as well as added warmth at night.
The best solution for needing more insulation is to buy more insulation - the SOL Emergency Givy is not insulation, in my opinion.
"A foolish consistency is the hobgoblin of little minds." Ralph Waldo Emerson
Ideally, I would just buy "more insulation" if I could. I am considering some less expensive alternatives.Originally Posted by SilvrSurfr
What about a fleece sleeping bag "Add 12 Degrees Of Warmth When Used To Line Another Sleeping Bag"?
I have used the SOL Escape Bivy in temps 20 degrees and below 3 times, once down to 7 degrees with the use of an UQ and TQ and insulated clothing. The SOL Escape Bivy material is more along the lines of Frogg Togg material with the interior of the bag being aluminized with perforations throughout. I take it backpacking anytime I think the temp may drop below 40 degrees on high elevation and possible wind. The SOL Escape Bity is breathable and works as advertised. The SOL Emergency Bivy is aluminized plastic or something similar and is not breathable. It is for emergencies and will cause moisture building up inside the bag which can be dangerous in certain winter camping situations.
My hiking buddy Scott just got back from a two week mountaineering course in Washington State with the America Alpine Institute. One night after a long climb they set up a bivvy on a rock ledge. Some folks carried a sleeping bag, others just clothing, but his guide carried an SOL Emergency Bivvy and swears by it. I think he said the low was in the 40's. For what that's worth.
fishwater youtube channel: Check out my channel to see backpacking in New England
So...Say I get one of these escape bivys, should i use it as a bivvy on the outside of my sleeping bag, or as a liner?
Use it on the inside as a liner when it gets really cold. It works great
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