Originally Posted by
staehpj1
There are reasons why one might use synthetic insulation including some of the reasons you mentioned, but any synthetic insulation I have seen used in sleeping bags is neither as light nor as compressible as down. In fact no synthetic sleeping bag that I have seen even comes close to down for packed size or light weight.
Pete,
You are probably correct. What I should have said is "synthetic bags are close to......... of down."
However, I have bags that are close to the size and weight of my down bag for the same temp range.