The Teton Sports LEEF 0 Sleeping bag is very comfortable and has a soft lining. It will keep you warm and comfortable down to about 32oF (0oC), but after that you might find yourself putting on a few extra layers unless you have the body fat to insulate you. If the temperature is above 70oF (about 21oC) you'll be sleeping naked and with the zippers open so you don't wake up in a sweat puddle.
You probably won't want to keep the bag it comes with, as it is difficult to compress it. I would suggest buying an impermeable 20 liter compression sack.
Finally, if you are over 5 and a half feet tall, buy the long sized sleeping bag.
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