Hybrid insulation Separating layer

I'm just wondering what the best way to keep down in place when using dual layer bi-component insulation for clothing.
Is the No-See-Um mesh at half the cost of Argon going to be a reasonable way to do it?
Cecile feels the cold and I am trying to persuade her to take my un-utilised down and the left-overs from the half bag project and make an ultra warm vest
Not looking to make an Uberlite garment, more a very warm and relatively robust one
Shell will be the pink camouflage EPIC we got in America, then the Apex 2.5 then the down layer
I have 3 ounces of down from Simon which I am hoping will be just enough for a stitched thru vest in XXL if not a baffled one
Funny how my plans have changed but that's how it goes sometimes and if the Boss doesn't want it in the end I can always add another layer to my kit as my own vest is almost as old as dinosaur skin
Is the No-See-Um mesh at half the cost of Argon going to be a reasonable way to do it?
Cecile feels the cold and I am trying to persuade her to take my un-utilised down and the left-overs from the half bag project and make an ultra warm vest
Not looking to make an Uberlite garment, more a very warm and relatively robust one
Shell will be the pink camouflage EPIC we got in America, then the Apex 2.5 then the down layer
I have 3 ounces of down from Simon which I am hoping will be just enough for a stitched thru vest in XXL if not a baffled one
Funny how my plans have changed but that's how it goes sometimes and if the Boss doesn't want it in the end I can always add another layer to my kit as my own vest is almost as old as dinosaur skin