Lithium Sleeping Bag
Lithium Sleeping Bag, Rated comfortable down to 18 degrees and manageable to 0, the Lithium is perfect for all but the chilliest winter nights, and still weighs a mind-boggling 2lb 12oz. For your comfort this bag has stretchy baffles around the feet and head and a trapezoidal footbox that's wider in the toes and narrower in the heels to match the shape of your feet.