In fact lately I've been considering making a winter sock from poncho liners, but I'm still just in the considering stage of that project.
You could probably make a 3/4 sock by putting the PL on 90° to the hammock, hanging it on the RL and tying it shut under the hammock....not actually sure, just thinking out loud.
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Deep peace of the running wave to you.
Deep peace of the flowing air to you.
Deep peace of the quiet earth to you.
Deep peace of the shining stars to you.
Deep peace without end to you.
adapted from - ancient gaelic runes