The Thermarest XTherm Mattress is very lightweight small and easy to pack. It is also very comfortable and the R-value makes it a 4 season pad.
For more XTherm specs. – http://amzn.to/2sQ8gsM
Very Small Air Pump – http://amzn.to/2sJ0uRa
Best Sleep Ever – https://www.youtube.com/watch?v=NP_wYlAJpz0