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151348 600ml bottle cames with a decent stuff sack
Not sure where the kitchen scales are hiding

Its 'showerproof' try and avoid wearing it in the rain but when i have for 10mins or so the water beads off it. I suspect if you put a decent spray on coating it would be ok

My full downie has a tough outer layer, not canvas but a definitely feels a lot heavier and thicker than my old macpac of kathmandu downies. Give him a ring and ask about what options he has available

+1 for wear on earth, have a down vest and full jacket