I think it is easier to avoid drafts with even more narrow quilts in a hammock than on the ground. Because most hammocks wrap around your sides more or less, making it easier to keep a quilt tucked. I think the only way you will know is to practice and try it out. The 3 season Burrow has 3.5" loft, which I suppose is top layer only? If that is indeed top layer only, this quilt is way under rated at 20F. But even a small draft will ruin the warmth.