All this, and I haven't even gotten to my sleep system. I'm pretty proud of this, so pay attention: I have a 3 part system.

• The first part is a Thermarest mattress pad - it insulates you from the ground and gives you a very comfortable sleeping surface.
• Next is a synthetic cocoon sleeping bag liner. It provides about 10 degrees of warmth, but its main purpose is to separate me from the bivy sack. I won't be sleeping in the nude, and I have a lot of clothes to wear for this.
• The final part is the weatherproof bivy sack - I can bed down in a mud puddle and not get wet. The bivy has a bug net for the head, or I can zip it completely closed and hide out from a squall.