Thanks to everyone for the sympathy! So redoing my math, a quilt using 1.1 ripstop and 5oz climashield that is 6' long and tapers from 54" to 36" ought to have 19oz of material plus an allowance for thread, yarn, snap or velcro etc.. (each layer will have 2 1/2 square yards of material - 36" wide by 6' is 2 yards and the 2 triangles on the outside are 9" by 6' which is the same as one rectangle 9" by 6' which is the same as a rectangle 18" by 36" which = 1/2 square yard. whew!) That's still as light or lighter than anything I currently own. I'm really looking at quilts not for weight but for comfort as I like to wrap myself up, even at home in bed, but the weight is a nice bonus.
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If I wouldn't eat it at home, why would I want to eat it on the trail?