> Thanks. So then why don`t we sleep this way in a tent with a quilt
> over us and tucked in on the sides?
Some do use a quilt on a ground pad on the ground. Jardine advocates
this in Beyond Backpacking, and a number of ultralight hikers have
taken it up. (He also mentions that one gets used to ants "getting
into everything including our clothing at night". [Beyond Backpacking
My take is that a quilt is particularly handy in a hammock which has
sides to keep the quilt bunched up on top of me - and the pad bunched
up around my body as well. My quilt made of Polarguard 3D and about
1.5 inches thick lays on top of me with several (3-6?) inches of top
insulation when I am in the hammock. It has been good down to 5
degrees, well below what I designed it for.
I choose to watch the ants on the ground from the hammock.