Now we need some insulation for the bottom of the hammock.
Because a hammock wraps around your body as you lie in it, it will compress the insulation material of sleeping bag which renders it ineffective. In the tropical conditions for which they were first designed,
this may not be a problem.
In temperate zones many approaches have been tried to address this issue but most of them fall into one of two methods.
Perhaps the easiest method is to use insulation that fill not compress. Many people use a camping mat of foam or filled with air, placed in the hammock or between two layers specially constructed for the purpose, and then use a normal sleeping bag on top.