Nope, no space blanket yet.
With an ESB and some added Evazote padding, I have no idea how low it'll go. I'm really impressed!
And no, this is the first year that I've hammocked other than Summer, so no other systems yet. Maybe a No Sniveler or Nest under everything else when it gets really cold*? I don't know yet.
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*Down here, really, really cold is around 0F. Really cold is below 20F.
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