So that means that there are going to be all these yarn loops throughout the quilt? I don’t think I’ve ever seen a synthetic fill sleeping bag that had yarn loops going through the shell fabric. Is there another way to secure the insulation from bunching up?
Sure, there are ways to do it other than with yarn loops. They involve stitching the insulation directly to the shell, liner, or to an intermediary scrim. This type of construction usually includes other design elements to limit the zero-loft effect from direct insulation stitching, such as shingle construction or offset quilting.
The yarn loops, though, work quite well (except on short-staple insulations) and are very easy to pull off. They do look frumpy, though, but a lot of frumpy gear works well on the trail.
AYCE