Originally Posted By Echterling

An ultralight winter sleeping bag is a pretty monstrous thing. It doesn't matter how high the fill power of down is, such a bag will never pack very small. Things get even worse when a WPB fabric is used for the shell of the sleeping bag.


By the manufacturer's definition I guess you're right. But for me a "winter" bag is a Golite Ultra 20 (a.k.a. Ulra 30) and in the summer I just use my poncho liner or nothing at all (unless I vacation North for cooler weather).
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-Larry