I have a Hennessy Hammock that I've used for years on annual two week section hikes of the AT. Very comfortable, which is why I looked into them. Hammocks sleep cold without the insulation of the ground so you should look into a underquilt. I use an underquilt and overquilt from JRB <http://www.jacksrbetter.com/> - look at their web site and you'll understand. kmat is right, the hammockforums.net web site is a great source for info. Happy hanging!