I have a goose down sleeping bag but it's sewn through. It's a chinese made AEGIUSMAX lightweight goose down sleeping bag. Very light and fluffs up well but the problem is the baffles are sewn through. I bought this just to experiment making some lightweight kit.
Because the baffles are sewn through. naturally wind will make it through the bag sewing holes which will be a problem for warmth.
I have a polyester/spaceplanket hybrid sack I could put it into. It could act as a shell to stop the wind from getting into the bag and through the holes. It breathes rather well thankfully as it's covered with numerous octagons of a foil like substance with gaps of polyester in between.
I was wondering whether putting that around the outside of the bag would help at all? I haven't had the chance to test it in the cold yet so I thought I would ask some of you what you thought about this idea.
I naturally want my kit to be as light as possible.
Thanks