15º Mountain Hardwear Ultralamina gets me through 70% of the season
50º Marmot Nanowave gets me through the summer and I add it to the Ultralamina in deep, deep winter.
I also have... THE GREATEST SLEEPING BAG EVER MADE!
Seriously, 20ºF and 3.3lbs for $79? I don't really understand how EMS makes a profit. These are great bags. If you need extras for scouts, girlfriends, boyfriends, mothers, fathers, dogs- this is the bag to get.