I think Ralph was saying to use the open cell under the hammock,
rather than in the hammock, for the reason that you mentioned.
Bill in Houston
--- In firstname.lastname@example.org
, "Dave Womble" <dpwomble@y...>
> --- In email@example.com, Ralph Oborn
> > I think the consensus is for hammocking use open cell if you can
> keep it dry.
> That's not what I would have thought. I thought most hammockers
> closed cell foam pads because the pads typically support all or
> of the occupants weight and that open cell foam pads would be
> compressed too much to provide significant insulation. Exceptions
> this are self inflating pads that use open cell foam but also trap
> air to keep you from completely compressing the foam and the under-
> hammock approach that Hennessy has recently employed which also
> positions the open cell foam in a way that attempts to keep you
> significantly compressing it.
> All compressable under-hammock insulation has a fit issue, in that
> it is too tight you compress some/all of the insulation and don't
> much insulation from it and if it is too loose you get some
> convection heat transfer because of the air gaps that limits the
> insulation you can get from your conductive insulating layer.