The Kelty Cosmic Ultra 20 Sleeping Bag is Kelty's premium mummy bag for backpackers who take their sleep seriously, no matter what's going on outside the tent. It's filled with top shelf 800 Fill DriDown for better performance in wet or humid conditions, and designed with an innovative trapezoidal baffle construction that retains heat to keep you warmer for longer. The women's model is optimized for you, with narrower shoulders, wider hips, and a little extra insulation in the upper body and footbox.