Warm and cloudless nights don't require shelter, but having the Kelty Cosmic 40-Degree Down Sleeping Bag is pretty nice when you're sleeping under the desert stars. Its 600-fill DriDown will stay warm even if it gets a little damp, so dew won't wake you up before you're ready, and the soft taffeta lining will help you stay comfy even if you decide to sleep in the buff. Kelty also decked the Cosmic out with a Thermal-Comfort hood, draft tube, and Natural Fit footbox, so you'll stay warm even if the evening is a little bit breezier than anticipated.