I have always wondered why hammocks don't have a special integral compartment under the bit where you lay so you can stuff what ever you like as an underquilt .
I am not talking about the two layer system where you can slide your sleeping pad in like some hammocks have but more like a compartment that hangs about an inch or two under the main hammock(but is still attached and part of the hammock) so that what ever you put in there does not get compressed up and insulates instead . It would just need a 2 inch wide but very long strip of cloth sewn round the underside of the hammock and another layer sewn on to that
Old fur coats ,wool blankets or an old sleeping bag would just be a mater of sliding in then. Job done
does that make sence ? would it work?