The Kelty Cosmic 20 Sleeping Bag takes us back to geometry class, utilizing trapezoidal baffles to maximize heat retention on cool nights in the backcountry. The 550-fill down insulation ensures we stay warm from spring through fall, with a water-resistant treatment that keeps the down lofty on rainy days. The expanded footbox gives our feet room to move while we sleep, allowing us to sleep in natural positions for a more restful night, and the zippered stash pocket keeps our phone or headlamp nearby so we can wake up before dawn to catch a stunning mountain sunrise.