>>266609>That takes a time investment as well, which not everyone has.You have time to go camping in the outdoors, but you can't spare a few hours to sew three rectangular pieces of fabric together?
>This isn't even considering that you will most likely fuck up the first quilt or sleeping bag you try to DIY unless you already have legit sewing skills. You could make a practice one out of muslin (which still costs money) but that doesn't behave nearly the same way silnylon does -- the puckering alone can fuck up your expensive material. Silnylon is silicone-coated nylon. It's the waterproof material used for tarps. You can just use ordinary nylon for sleeping bags and quilts, which is easier to work with. As for mistakes, practice makes perfect, but if you screw up too badly, just use a seam-ripper.
>but I think your examples are all "best-case" kinds of things that are on the low end of the UL gear spectrum.Fair enough. Of course, most of them are just that. The point is that it's all relative, and although personally, I prefer higher-end down sleeping bags that go for $350 minimum, many people do go the 40 degree quilt route, and are perfectly happy with layering to take it colder. See:
>>266550.
