To answer food's question, it is synthetic. I did a post on it in the MYOG section. Basically, I bought the insulation from Thru-hiker, and the ripstop from Walmart. I weighed the ripstop at 1.1 oz per yard, so paying $1.50 was a pretty good deal. With the insulation, it came out to be a $70 quilt without counting labor. It weighs a hair over a kilogram. I wanted it to be a 20F quilt. I have had it to freezing a few times, and it has performed extremely well. I am sure it is a 20F quilt, at least with me wearing clothing. I didn't cut the width, it is a full 60". The best thing about synthetic quilts is that you can be the worst seamstress in the world and still get one that works. You can even do it by hand, it will just take longer.