Fabric arrived so I can attempt to make a hiking quilt. This is going to save me many hundreds or be a total failure.
The green and purple is the shell and the black is actually mesh for the baffles. All are downproof. The shell is 1oz per square yard and the mesh is 0.5oz per square yard, not quite the lightest fabric but not far off, and got enough for two if all going well I'll make a summer one alter on, if it goes badly I can have two attempts. Haven't brought the down yet in case it all goes wrong from the start.
if anyone wants to know more then
So down flll power is how many inches cubed per oz. So 860 down, 1 oz will ill 860 cubic inches. Most places over stuff by 20% so you just need to work out the volume of each baffle area, then add 20%.
and the best video I've found so far is.
I'm just doing a quilt no fancy stuff, i'm a side sleeper, move around a lot and like rolling myself up in it. Will be going for 1.8" baffle and probably a double duvet size or a bit smaller, need to work out the exact weights and decide how much comfort/weight.