Have a look at the One Planet Bungle bags from Dwights. Just got the -10 version for $490 and its a mint bit of kit. Bang on 1kg, hydrophobic 850 loft down, full zip, good compression sack and heaps of footroom. Exterior fabric is pretty lightweight but still feels solid. They’ve got a -15 version too for a bit more but it’s still only around 1150g.
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