I use my BMW PG 14 oz parka and 8 oz PG pants to get about 20*F or
more extra top warmth in my hammock, PeaPod or other systems. Or, I
have used them alone at 50*F or slightly lower with no bag and a HH SS
below, and was pretty comfortable.
But I'm wondering how much a good vest could add to this? I'm thinking
of this Patagonia down vest I have. It weighs 9 0z, and has an
incredible 3.75" of total dual layer loft, at least in the thickest
areas. It has a good seal around the neck and waist and pretty good at
the arms. I can wear it under my 14 oz PG parka without compressing
it's loft, or over the parka, or drape it on top of me around my neck
and shoulders where it will loft up to contact the Pod and help seal
off drafts if I have the pod breathing hole open. Or, I can just layer
it under me down in the Pod to boost the warmth from below which
should also help on top. Etc.
At least that seams to be my theory of how it would or could work. It
seems to me such a thick vest would help a lot, but I have never used
one very much for this purpose. I have used it more down in my SS UC,
where it seemed to help a good bit.
Does any one hear have experience using vests for making a bag or
quilt or pod warmer, and if so, how helpful was it? Do you feel that
it is a lot of warmth for the weight, or not so much?