DIY half bag

[Moondog55]

Good question and after thinking about it some more the method I outlined above is what I'll do
So LW fabric for the inner layer but use the mesh for the down constraint. If you make the mesh 10 to 20% bigger than the Argon it will expand out into the void between shells then use the standard differential cut tables for the outer.
Somewhat cheaper and quicker I think than using baffles
Of course a as we discussed earlier a baffled down bag will be lighter and warmer but the hybrid is probably better for my wants unless a WPB shell was being used and in this case i have the LW Tyvek for that as the separate layer and still less than 800g

[undercling-mike]

Yep, sounds like that would be a good plan. Not too far away from what you've ended up with. It's a quite unique piece of gear.

[neilmny]

Looks fine to me MD.
Let's face it, it's all about function when all said and done.
Were you trying to stop slip with the paper?
I found I didn't need to do this if I had plenty of pins. One thing I did find was that running backwards say at the start of a hem was not good. I got some weird knots going on that I just untied then tied off to stop the thread coming loose. I was using a Schmetz 70/10 universal needle with Guterman Mara 70 thread.

[Moondog55]

Without the paper the polyester insulation was getting caught up in the machine

[neilmny]

............

[Moondog55]

Here's the response I just received from the engineers at Climasheild

A response from one of our engineers ...

It is not necessary to run the insulation at right angles one layer relative to the other. For apparel it is preferred to place in the insulation in a way that across the roll is vertical (eg, up and down in the garment so the predominant direction of the filaments are running head to feet). For sleeping bags across the roll direction same as across the body. These are all rules of thumb and we have customers who do not follow these guidelines with success. The most important things are to ensure all edges of the cut insulation pieces are sewn/surged the entire perimeter at least 0.5" from the edge. Also, when using multiple layers of our insulation we recommend you place a lightweight "scrim" material between the layers as a protective interface to prevent negative interactions between the two layers.

OK so what do we use for the scrim and where do we get it?