So i`d like to add a hammock to my BOB as well as backpack camping.

What do you guys suggestion?
I need to fill the following requirements.

- Tough & Durable
- Can fit in backpack
- No supports (for weight, and wrap-around = no falling out)
- Multi-Layer if possible so if it's cold you can sandwhich yourself between two things (therm-a-rest).


What do you use or suggest? And where can I see/buy them?
Thanks!

-Todd