A well researched and field-tested checklist for backpacking
Big Agnes Insulated Q-Core SLX
It's quiet, light, tough, toasty, packable and easy to inflate/delfate. Good for 3-season comfort in the backcountry. Klymit Static lower cost alternative.
REI Co-op Midweight
Uniqlo HEATTECH as a low cost alternative but not as durable and doesn't dry as quickly or wick sweat/moisture as well.